Cita APA (7th ed.)

Opie, C., Opie, C., & Shultz, S. (2013). The evolution of social systems in human and non-human primates.

Cita Chicago (17th ed.)

Opie, C., Christopher Opie, i S. Shultz. The Evolution of Social Systems in Human and Non-human Primates. 2013.

Cita MLA (9th ed.)

Opie, C., et al. The Evolution of Social Systems in Human and Non-human Primates. 2013.