Ryan, E. J. (1946). Psychobiologic foundations in dentistry. Thomas.
Lua i Stíl Chicago (17ú heag.)Ryan, Edward James. Psychobiologic Foundations in Dentistry. Springfield, IL: Thomas, 1946.
Lua MLA (9ú heag.)Ryan, Edward James. Psychobiologic Foundations in Dentistry. Thomas, 1946.
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