update citation

README.md

@@ -27,3 +27,9 @@ An interactive game where players listen to audio clips and guess their geograph
 - Real-time coordinate input
 - Previous round answer display with OpenStreetMap links
 
+
+## Citation
+
+If you use this work, please cite:
+
+Ruixing Zhang, Zihan Liu, Leilei Sun, Tongyu Zhu, and Weifeng Lv. "The Sonar Moment: Benchmarking Audio-Language Models in Audio Geo-Localization." arXiv preprint arXiv:2601.03227 (2026). Available at: [https://arxiv.org/abs/2601.03227](https://arxiv.org/abs/2601.03227)