Update README.md

README.md

@@ -88,3 +88,13 @@ The dataset has three main splits: train, validation, validation_unique (with on
 
 ### Citation Information
 
+```bibtex
+@misc{kirstain2023pickapic,
+      title={Pick-a-Pic: An Open Dataset of User Preferences for Text-to-Image Generation}, 
+      author={Yuval Kirstain and Adam Polyak and Uriel Singer and Shahbuland Matiana and Joe Penna and Omer Levy},
+      year={2023},
+      eprint={2305.01569},
+      archivePrefix={arXiv},
+      primaryClass={cs.CV}
+}
+```