Cita APA (7a ed.)

Berndt, T. J., & Ladd, G. W. (1989). Peer relationships in child development. John Wiley & Sons.

Cita Chicago Style (17a ed.)

Berndt, Thomas J., y Gary W. Ladd. Peer Relationships in Child Development. New York [etc.]: John Wiley & Sons, 1989.

Cita MLA (9a ed.)

Berndt, Thomas J., y Gary W. Ladd. Peer Relationships in Child Development. John Wiley & Sons, 1989.