Google challenge.

MLA

Song, Yicheng, et al. “Google Challenge.” Proceedings of the 17th ACM International Conference: Multimedia, Oct. 2009, pp. 1113–14. EBSCOhost, https://doi.org/10.1145/1631272.1631524.

APA

Song, Y., Zhang, Y., Zhang, X., Cao, J., & Li, J.-T. (2009). Google challenge. Proceedings of the 17th ACM International Conference: Multimedia, 1113–1114. https://doi.org/10.1145/1631272.1631524

Chicago

Song, Yicheng, Yong-dong Zhang, Xu Zhang, Juan Cao, and Jing-Tao Li. 2009. “Google Challenge.” Proceedings of the 17th ACM International Conference: Multimedia, October, 1113–14. doi:10.1145/1631272.1631524.