APA-referens (7:e uppl.)

Ryan, E. J. (1946). Psychobiologic foundations in dentistry. Thomas.

Chicago-referens (17:e uppl.)

Ryan, Edward James. Psychobiologic Foundations in Dentistry. Springfield, IL: Thomas, 1946.

MLA-referens (9:e uppl.)

Ryan, Edward James. Psychobiologic Foundations in Dentistry. Thomas, 1946.