diff --git a/src/common/entities/MarcFieldContent/MarcFieldContent.js b/src/common/entities/MarcFieldContent/MarcFieldContent.js
index 9f3d5304..fc13ac8b 100644
--- a/src/common/entities/MarcFieldContent/MarcFieldContent.js
+++ b/src/common/entities/MarcFieldContent/MarcFieldContent.js
@@ -57,7 +57,7 @@ export class MarcFieldContent {
     return this.subfieldsArr.forEach(callback);
   }
 
-  join() {
+  toContentString() {
     return this.subfieldsArr.reduce((acc, cur) => {
       return `${acc} ${cur.code} ${cur.value}`;
     }, '').trim();
diff --git a/src/common/entities/MarcFieldContent/MarcFieldContent.test.js b/src/common/entities/MarcFieldContent/MarcFieldContent.test.js
index 581ee886..6d407005 100644
--- a/src/common/entities/MarcFieldContent/MarcFieldContent.test.js
+++ b/src/common/entities/MarcFieldContent/MarcFieldContent.test.js
@@ -51,9 +51,9 @@ describe('MarcFieldContent', () => {
     });
   });
 
-  describe('when calling `join`', () => {
+  describe('when calling `toContentString`', () => {
     it('should transform subfields array back to a string', () => {
-      expect(marcFieldContent.join()).toEqual(content);
+      expect(marcFieldContent.toContentString()).toEqual(content);
     });
   });
 
@@ -61,7 +61,7 @@ describe('MarcFieldContent', () => {
     it('should add a new subfield to the end', () => {
       marcFieldContent.append('$a', 'a3');
 
-      expect(marcFieldContent.join()).toEqual(`${content} $a a3`);
+      expect(marcFieldContent.toContentString()).toEqual(`${content} $a a3`);
     });
   });
 
@@ -69,7 +69,7 @@ describe('MarcFieldContent', () => {
     it('should add a new subfield to the beginning', () => {
       marcFieldContent.prepend('$a', 'a3');
 
-      expect(marcFieldContent.join()).toEqual(`$a a3 ${content}`);
+      expect(marcFieldContent.toContentString()).toEqual(`$a a3 ${content}`);
     });
   });
 
@@ -77,7 +77,7 @@ describe('MarcFieldContent', () => {
     it('should remove all subfields by code', () => {
       marcFieldContent.removeByCode('$a');
 
-      expect(marcFieldContent.join()).toEqual('$b b1 $b b2');
+      expect(marcFieldContent.toContentString()).toEqual('$b b1 $b b2');
     });
   });
 
diff --git a/src/hooks/useAuthorityLinking/useAuthorityLinking.js b/src/hooks/useAuthorityLinking/useAuthorityLinking.js
index 6b8fd3e8..930d1b87 100644
--- a/src/hooks/useAuthorityLinking/useAuthorityLinking.js
+++ b/src/hooks/useAuthorityLinking/useAuthorityLinking.js
@@ -31,12 +31,6 @@ import {
   QUICK_MARC_ACTIONS,
 } from '../../QuickMarcEditor/constants';
 
-const joinSubfields = (subfields) => Object.keys(subfields).reduce((content, key) => {
-  const subfield = subfields[key].join(` ${key} `);
-
-  return [content, `${key} ${subfield}`].join(' ');
-}, '').trim();
-
 const formatSubfieldCode = (code) => { return code.startsWith('$') ? code : `$${code}`; };
 
 const useAuthorityLinking = ({ tenantId, marcType, action } = {}) => {
@@ -192,7 +186,7 @@ const useAuthorityLinking = ({ tenantId, marcType, action } = {}) => {
     updatedBibSubfields.removeByCode('$9');
     updatedBibSubfields.append('$9', authorityRecord.id);
     bibField.prevContent = bibField.content;
-    bibField.content = updatedBibSubfields.join();
+    bibField.content = updatedBibSubfields.toContentString();
   }, [copySubfieldsFromAuthority, sourceFiles]);
 
   const getSubfieldGroups = useCallback((field, suggestedField) => {
@@ -211,11 +205,11 @@ const useAuthorityLinking = ({ tenantId, marcType, action } = {}) => {
     const uncontrolledAlphaSubfields = new MarcFieldContent(field.subfieldGroups?.[UNCONTROLLED_ALPHA]);
 
     const uncontrolledNumber = uncontrolledNumberSubfields.$9?.[0]
-      ? uncontrolledNumberSubfields.removeByCode('$9').join()
+      ? uncontrolledNumberSubfields.removeByCode('$9').toContentString()
       : field.subfieldGroups[UNCONTROLLED_NUMBER];
 
     const uncontrolledAlpha = uncontrolledAlphaSubfields.$9?.[0]
-      ? uncontrolledAlphaSubfields.removeByCode('$9').join()
+      ? uncontrolledAlphaSubfields.removeByCode('$9').toContentString()
       : field.subfieldGroups[UNCONTROLLED_ALPHA];
 
     return {
@@ -237,7 +231,7 @@ const useAuthorityLinking = ({ tenantId, marcType, action } = {}) => {
     ) {
       return {
         ...field,
-        content: subfields.removeByCode('$9').join(),
+        content: subfields.removeByCode('$9').toContentString(),
       };
     }
 
@@ -338,7 +332,7 @@ const useAuthorityLinking = ({ tenantId, marcType, action } = {}) => {
     delete field.linkDetails;
     delete field.subfieldGroups;
 
-    field.content = field.prevContent ?? bibSubfields.join();
+    field.content = field.prevContent ?? bibSubfields.toContentString();
     delete field.prevContent;
 
     return {