Levinsion, H. (1989). Phobia free: A medical breakthrough linking 90. M. Evans.
Chicago-čujuhus (17. p.)Levinsion, Harold. Phobia Free: A Medical Breakthrough Linking 90. M. Evans, 1989.
MLA-čujuhus (9. p.)Levinsion, Harold. Phobia Free: A Medical Breakthrough Linking 90. M. Evans, 1989.
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