Cita APA (7a ed.)

Hardy, R. E., & Cull, J. G. (1974). Group counseling and therapy techniques in special settings. American lecture series.

Cita Chicago Style (17a ed.)

Hardy, Richard E., y John G. Cull. "Group Counseling and Therapy Techniques in Special Settings." American Lecture Series 1974.

Cita MLA (8a ed.)

Hardy, Richard E., y John G. Cull. "Group Counseling and Therapy Techniques in Special Settings." American Lecture Series, 1974.