APA (7th ed.) Citation

Clarkson, P., & Mackewn, J. (1993). Fritz Perls / Petrúska Clarkson [and] Jennifer Mackewn. Sage.

Chicago Style (17th ed.) Citation

Clarkson, Petrúska, and Jennifer Mackewn. Fritz Perls / Petrúska Clarkson [and] Jennifer Mackewn. London: Sage, 1993.

MLA (9th ed.) Citation

Clarkson, Petrúska, and Jennifer Mackewn. Fritz Perls / Petrúska Clarkson [and] Jennifer Mackewn. Sage, 1993.

Warning: These citations may not always be 100% accurate.