Gaya APA

Gravetter, F, J., Wallnau, L, B. (2009). Statistics for the Behavioral Sciences 8'th Ed. (8). USA: Wadsworth.

Gaya MLA

Gravetter, Frederick, J.., Wallnau, Larry, B.. "Statistics for the Behavioral Sciences 8'th Ed.". 8 USA: Wadsworth, 2009. Text.