fix bibtex format problems

README.md

@@ -34,6 +34,7 @@ ls -lh tuxun_comblined.csv
 ## Additional Information
 
 ### Citation Information
+```bibtex
 @misc{song2025geolocationrealhumangameplay,
       title={Geolocation with Real Human Gameplay Data: A Large-Scale Dataset and Human-Like Reasoning Framework}, 
       author={Zirui Song and Jingpu Yang and Yuan Huang and Jonathan Tonglet and Zeyu Zhang and Tao Cheng and Meng Fang and Iryna Gurevych and Xiuying Chen},
@@ -43,6 +44,7 @@ ls -lh tuxun_comblined.csv
       primaryClass={cs.CV},
       url={https://arxiv.org/abs/2502.13759}, 
 }
+```
 
 ### Links
 [arXiv](https://arxiv.org/abs/2502.13759)