Cita APA (7a ed.)

Pfadt, A. (1991). Group psychotherapy with mentally retarded adults: Issues related to design, implementation, and evaluation. [s.n.].

Cita Chicago Style (17a ed.)

Pfadt, Al. Group Psychotherapy with Mentally Retarded Adults: Issues Related to Design, Implementation, and Evaluation. [S.l.]: [s.n.], 1991.

Cita MLA (9a ed.)

Pfadt, Al. Group Psychotherapy with Mentally Retarded Adults: Issues Related to Design, Implementation, and Evaluation. [s.n.], 1991.