Update README.md

README.md

@@ -2624,5 +2624,12 @@ The model usage is documented [here](https://github.com/ContextualAI/gritlm?tab=
 # Citation
 
 ```bibtex
-TODO
+@misc{muennighoff2024generative,
+      title={Generative Representational Instruction Tuning}, 
+      author={Niklas Muennighoff and Hongjin Su and Liang Wang and Nan Yang and Furu Wei and Tao Yu and Amanpreet Singh and Douwe Kiela},
+      year={2024},
+      eprint={2402.09906},
+      archivePrefix={arXiv},
+      primaryClass={cs.CL}
+}
 ```