Gaya APA

Knowles, J, W. (1970). Group counseling, 2nd printing. - Successful Pastoral Counseling Series. Copyright 1964. . Philadelphia: Fortress Press.

Gaya MLA

Knowles, Joseph, W.. "Group counseling, 2nd printing. - Successful Pastoral Counseling Series. Copyright 1964. ". Philadelphia: Fortress Press, 1970. Buku.