APA (7th ed.) Citation

Gey, F., Larson, R., Sanderson,, M., Bischoff, K., Mandl, T., Womser-Hacker, C., . . . Ferro, N. (2009). Challenges to Evaluation of Multilingual Geographic Information Retrieval in GeoCLEF.

Chicago Style (17th ed.) Citation

Gey, Fredric, et al. Challenges to Evaluation of Multilingual Geographic Information Retrieval in GeoCLEF. 2009.

MLA (8th ed.) Citation

Gey, Fredric, et al. Challenges to Evaluation of Multilingual Geographic Information Retrieval in GeoCLEF. 2009.

Warning: These citations may not always be 100% accurate.