diff --git a/forKinsukAndSjors/niveau3/English/PieterPott_English.json b/forKinsukAndSjors/niveau3/English/PieterPott_English.json
index 885757f..281f241 100644
--- a/forKinsukAndSjors/niveau3/English/PieterPott_English.json
+++ b/forKinsukAndSjors/niveau3/English/PieterPott_English.json
@@ -114,25 +114,44 @@
             {
                 "Type of source": "Article",
                 "Name": "Pott, P. H. & Sutaarga, M. A.  \u201cArrangements concluded or in progress for the Return of Objects: the Netherlands \u2013 Indonesia.\u201d Museum XXXI (1979): 38 - 42.",
-                "Persistent identifier": "https://doi.org/10.1111/j.1468-0033.1979.tb01872.x",
+                "Link": [
+                    {
+                        "URL": "https://doi.org/10.1111/j.1468-0033.1979.tb01872.x"
+                    }
+                ],
                 "Description and remarks": "Article for Unesco's Museum magazine written by P. Pott and M. Amir Sutaarga containing a brief history of the Dutch handling of Indonesian cultural objects during the colonial era and a description of the creation and implementation of the joint recommendations between the two countries in 1975."
             },
             {
                 "Type of source": "Article",
                 "Name": "Stutje K. The History of the Indonesian Dutch Restitution Debate: Working Paper. Amsterdam: NIOD Instituut voor Oorlog- Holocaust- en Genocidestudies, 2022.",
-                "Persistent identifier": "OCLC: 1303213495",
+                "Link": [
+                    {
+                        "OCLC": "1303213495"
+                    },
+                    {
+                        "URL": "https://pure.knaw.nl/portal/en/publications/the-history-of-the-indonesian-dutch-restitution-debate-working-pa"
+                    }
+                ],
                 "Description and remarks": "Artikel over de geschiedenis van het restitutiedebat tussen Indonesi\u00eb en Nederland tussen 1945 en nu. Geschreven in het kader van PPROCE. Het artikel heeft als doel een overzicht te geven van de ontwikkelingen op het gebied van restitutie- en erfgoeddebatten tussen Indonesi\u00eb en Nederland."
             },
             {
                 "Type of source": "Book",
                 "Name": "Beurden, J. van. Treasures in Trusted Hands: Negotiating the Future of Colonial Cultural Objects. Leiden: Sidestone Press, 2017.",
-                "Persistent identifier": "ISBN: 9789088904417",
+                "Link": [
+                    {
+                        "ISBN": "9789088904417"
+                    }
+                ],
                 "Description and remarks": "Dissertation on the history and future of the restitution debate. Devotes considerable attention to the relationship between the Netherlands and Indonesia and uses interesting source material."
             },
             {
                 "Type of source": "Book",
                 "Name": "Pott P.H W.R. van Gulik Harald S. van der Straaten and Simon Kooijman. From Field-Case to Show-Case: Research Acquisition and Presentation in the Rijksmuseum Voor Volkenkunde (National Museum of Ethnology) Leiden: In Tribute to Professor P.h. Pott on the 25th Anniversary of His Directorship of the Rijksmuseum Voor Volkenkunde Leiden. Amsterdam: Gieben, 1980.",
-                "Persistent identifier": "ISBN: 9789070265823",
+                "Link": [
+                    {
+                        "ISBN": "9789070265823"
+                    }
+                ],
                 "Description and remarks": "Book celebrating 25 years of Pott's directorship. Contains more information about the person of Pieter Pott."
             }
         ]