John Beloff. (1973). Psychological sciences. Crosby Lockwood Staples.
Lua i Stíl Chicago (17ú heag.)John Beloff. Psychological Sciences. London: Crosby Lockwood Staples, 1973.
Lua MLA (9ú heag.)John Beloff. Psychological Sciences. Crosby Lockwood Staples, 1973.
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