Cita APA (7a ed.)

Pellegrini, A. D., & Smith, P. K. (2005). The Nature of play: Great apes and humans. Guilford Press.

Cita Chicago Style (17a ed.)

Pellegrini, Anthony D., y Peter K. Smith. The Nature of Play: Great Apes and Humans. New York: Guilford Press, 2005.

Cita MLA (9a ed.)

Pellegrini, Anthony D., y Peter K. Smith. The Nature of Play: Great Apes and Humans. Guilford Press, 2005.