APA

Ruitenbeek H. M., . (1969). Group therapy today: styles, methods, and techniques. New York: Atherton Press.

Chicago

Ruitenbeek Hendrik Marinus, . 1969. Group therapy today: styles, methods, and techniques. New York: Atherton Press.

Harvard

Ruitenbeek H. M., . (1969). Group therapy today: styles, methods, and techniques. New York: Atherton Press.

MLA

Ruitenbeek Hendrik Marinus, . Group therapy today: styles, methods, and techniques. New York: Atherton Press. 1969.