Cita APA (7a ed.)

Gulla, J. A., Gulla, J. A. C., Tavakolifard, M. C., & Almeroth, K. C. C. (2013). Proceedings of the International Workshop and Challenge on News Recommender Systems: 2013, Hong Kong NRS '13. ACM.

Cita Chicago Style (17a ed.)

Gulla, Jon Atle, Jon Atle Contributor Gulla, Mozhgan Contributor Tavakolifard, y Kevin C Contributor Almeroth. Proceedings of the International Workshop and Challenge on News Recommender Systems: 2013, Hong Kong NRS '13. [Place of publication not identified]: ACM, 2013.

Cita MLA (9a ed.)

Gulla, Jon Atle, et al. Proceedings of the International Workshop and Challenge on News Recommender Systems: 2013, Hong Kong NRS '13. ACM, 2013.