Cita APA (7a ed.)

Free, M. L. (1999). Cognitive therapy in groups: Guidelines and resources for practice. Wiley & Sons.

Cita Chicago Style (17a ed.)

Free, Michael L. Cognitive Therapy in Groups: Guidelines and Resources for Practice. Chichester [etc.]: Wiley & Sons, 1999.

Cita MLA (9a ed.)

Free, Michael L. Cognitive Therapy in Groups: Guidelines and Resources for Practice. Wiley & Sons, 1999.