Cita APA (7a ed.)

Ayala, F. J., Head, J. J., & Khoury, D. (1983). The origin of species. Carolina Biological Supply, Scientific Publications Department.

Cita Chicago Style (17a ed.)

Ayala, Francisco José, J. J. Head, y Diana Khoury. The Origin of Species. Burlington, N.C.: Carolina Biological Supply, Scientific Publications Department, 1983.

Cita MLA (8a ed.)

Ayala, Francisco José, et al. The Origin of Species. Carolina Biological Supply, Scientific Publications Department, 1983.