Cita APA (7a ed.)

Ohlsen, M. M., & Joseph, H. (1970). Group counseling. Holt, Rinehart and Winston.

Cita Chicago Style (17a ed.)

Ohlsen, Merle M., y Harry Joseph. Group Counseling. New York [etc.]: Holt, Rinehart and Winston, 1970.

Cita MLA (9a ed.)

Ohlsen, Merle M., y Harry Joseph. Group Counseling. Holt, Rinehart and Winston, 1970.