updates

README.md

@@ -101,8 +101,23 @@ While we have not yet released GPT-2 itself, you can see some samples from it in
 We show unconditional samples with default settings (temperature 1 and no truncation), with temperature 0.7, and with truncation with top_k 40.
 We show conditional samples, with contexts drawn from `WebText`'s test set, with default settings (temperature 1 and no truncation), with temperature 0.7, and with truncation with top_k 40.
 
+## Citation
+
+Please use the following bibtex entry:
+```
+@article{radford2019language,
+  title={Language Models are Unsupervised Multitask Learners},
+  author={Radford, Alec and Wu, Jeff and Child, Rewon and Luan, David and Amodei, Dario and Sutskever, Ilya},
+  year={2019}
+}
+```
+
 ## Future work
 
 We may release code for evaluating the models on various benchmarks.
 
 We are still considering release of the larger models.
+
+## License
+
+MIT