Levinsion, H. (1989). Phobia free: A medical breakthrough linking 90. M. Evans.
Cita Chicago (17th ed.)Levinsion, Harold. Phobia Free: A Medical Breakthrough Linking 90. M. Evans, 1989.
Cita MLA (9th ed.)Levinsion, Harold. Phobia Free: A Medical Breakthrough Linking 90. M. Evans, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.