Cita APA (7a ed.)

Schaefer, C. E., Reddy, L. A., & Files-Hall, T. M. (2005). Empirically based play interventions for children (2nd print.). American Psychological Association.

Cita Chicago Style (17a ed.)

Schaefer, Charles E., Linda A. Reddy, y Tara M. Files-Hall. Empirically Based Play Interventions for Children. 2nd print. Washington: American Psychological Association, 2005.

Cita MLA (9a ed.)

Schaefer, Charles E., et al. Empirically Based Play Interventions for Children. 2nd print. American Psychological Association, 2005.