Gekoski, N. (1964). Psychological testing: Theory, interpretation, and practices. Thomas.
Lua i Stíl Chicago (17ú heag.)Gekoski, Norman. Psychological Testing: Theory, Interpretation, and Practices. Springfield: Thomas, 1964.
Lua MLA (9ú heag.)Gekoski, Norman. Psychological Testing: Theory, Interpretation, and Practices. Thomas, 1964.
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