Gaya APA

Combs, A, W., L, I, A, D. (1985). Helping relationships basic concepts for the helping professions . Boston: Boston: Allyn; 1985.

Gaya MLA

Combs, Arthur, W., L, I., Avila,, Donald. "Helping relationships basic concepts for the helping professions". Boston: Boston: Allyn; 1985, 1985. Text.