Gaya APA

Gravetter, F, J., Wallnau, L, B. (2013). Statistics for the Behavioral Sciences 9'th Ed. (9). USA: Wadsworth Cengange Learning.

Gaya MLA

Gravetter, Frederick, J.., Wallnau, Larry, B.. "Statistics for the Behavioral Sciences 9'th Ed.". 9 USA: Wadsworth Cengange Learning, 2013. Text.