Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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