Gravetter, F. J., Wallnau, L. B., & Gravetter, F. J. (2014). Essentials of statistics for the behavioral sciences. Wadsworth, Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Gravetter, Frederick J., Larry B. Wallnau, agus Frederick J. Gravetter. Essentials of Statistics for the Behavioral Sciences. Australia: Wadsworth, Cengage Learning, 2014.
Lua MLA (9ú heag.)Gravetter, Frederick J., et al. Essentials of Statistics for the Behavioral Sciences. Wadsworth, Cengage Learning, 2014.
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