Lua APA (7ú heag.)

Howell, D. C. (1989). Fundamental statistics for the behavioral sciences (2nd ed.). PWS-KENT.

Lua i Stíl Chicago (17ú heag.)

Howell, David C. Fundamental Statistics for the Behavioral Sciences. 2nd ed. Boston: PWS-KENT, 1989.

Lua MLA (9ú heag.)

Howell, David C. Fundamental Statistics for the Behavioral Sciences. 2nd ed. PWS-KENT, 1989.

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