Truner, R. G. e., & Willerman, L. e. (1979). Readings about individual and group differences. Freeman.
Lua i Stíl Chicago (17ú heag.)Truner, Robert G. ed, agus Lee ed Willerman. Readings About Individual and Group Differences. San Francisco: Freeman, 1979.
Lua MLA (9ú heag.)Truner, Robert G. ed, agus Lee ed Willerman. Readings About Individual and Group Differences. Freeman, 1979.
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