MLA

Porter, Ruth. The Role of Learning In Psychotherapy : a Ciba Foundation Symposium. London: Churchill, 1968.

APA

Porter, R. (1968). The role of learning in psychotherapy : a Ciba Foundation symposium. London: Churchill.

Chicago

Porter, Ruth ed. The Role of Learning In Psychotherapy: A Ciba Foundation Symposium. London: Churchill, 1968.