Citazione APA

O'Connor, K. J., Schaefer, C. E., & Braverman, L. D. Handbook of play therapy (Second edition.).

Stile di citazione Chicago

O'Connor, Kevin J., Charles E. Schaefer, e Lisa D. Braverman. Handbook of Play Therapy. Second edition.

Citazione MLA

O'Connor, Kevin J., et al. Handbook of Play Therapy. Second edition.