APA aipamena

Zhou, W., Sornette, D., Hill, R., & Dunbar, R. (2005). Discrete hierarchical organization of social group sizes.

Chicago Style aipamena

Zhou, W., D. Sornette, R. Hill, and R. Dunbar. Discrete Hierarchical Organization of Social Group Sizes. 2005.

MLA aipamena

Zhou, W., et al. Discrete Hierarchical Organization of Social Group Sizes. 2005.