MLA

Knight, Julie, and Ruth Porter. Psychology, Emotion & Psychosomatic Illness. Amsterdam: Elsevier, 1972.

APA

Knight, J., & Porter, R. (1972). Psychology, emotion & psychosomatic illness. Amsterdam: Elsevier.

Chicago

Knight, Julie ed., and Ruth Porter ed. Psychology, Emotion & Psychosomatic Illness. Amsterdam: Elsevier, 1972.