Gaya APA

Washton, A, M., Zweben, J, E. (2006). Treating alcohol and drug problems : in psychotherapy practice . New York: The Guilford Press.

Gaya MLA

Washton, Arnold, M.., Zweben, Joan, E.. "Treating alcohol and drug problems : in psychotherapy practice". New York: The Guilford Press, 2006. Text.