Aiken, L. R. (1988). Psychological testing and assessment (6th ed.). Allyn.
Lua i Stíl Chicago (17ú heag.)Aiken, Lewis R. Psychological Testing and Assessment. 6th ed. Boston: Allyn, 1988.
Lua MLA (9ú heag.)Aiken, Lewis R. Psychological Testing and Assessment. 6th ed. Allyn, 1988.
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