Cita APA (7a ed.)

Clarkson, P. (1993). Fritz perls. SAGE.

Cita Chicago Style (17a ed.)

Clarkson, Petruska. Fritz Perls. London: SAGE, 1993.

Cita MLA (9a ed.)

Clarkson, Petruska. Fritz Perls. SAGE, 1993.