Schaefer, H. H. 1., & Martin, P. L. (1975). Behavioral therapy (2nd ed.). Blakiston Division.
Lua i Stíl Chicago (17ú heag.)Schaefer, Halmuth H. 1928, agus Patrick L. Martin. Behavioral Therapy. 2nd ed. New York: Blakiston Division, 1975.
Lua MLA (9ú heag.)Schaefer, Halmuth H. 1928, agus Patrick L. Martin. Behavioral Therapy. 2nd ed. Blakiston Division, 1975.
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