added temporary citation option

README.md

@@ -109,6 +109,19 @@ for pred in nlp(f"আমি বাংলায় {nlp.tokenizer.mask_token} গা
 ## Reference
 * https://github.com/google-research/bert
 
+## Citation
+If you find this model helpful, please cite this.
+
+```
+@misc{Sagor_2020,
+  title   = {BanglaBERT: Bengali Mask Language Model for Bengali Language Understading},
+  author  = {Sagor Sarker},
+  year    = {2020},
+  url    = {https://github.com/sagorbrur/bangla-bert}
+}
+
+```
+