Update README.md

Added citation information

README.md

@@ -87,4 +87,19 @@ The dataset is a list stored in a [JSON file](https://huggingface.co/datasets/Ba
         "Root Category": "Electronics Device",
         "Product ID": "1400200"
     }
-]
+]
+```
+
+## Citation
+If you use this dataset, please cite the following:
+```
+@misc{shamael2024banglishrevlargescalebanglaenglishcodemixed,
+      title={BanglishRev: A Large-Scale Bangla-English and Code-mixed Dataset of Product Reviews in E-Commerce}, 
+      author={Mohammad Nazmush Shamael and Sabila Nawshin and Swakkhar Shatabda and Salekul Islam},
+      year={2024},
+      eprint={2412.13161},
+      archivePrefix={arXiv},
+      primaryClass={cs.CL},
+      url={https://arxiv.org/abs/2412.13161}, 
+}
+```