Gaya APA
Gravetter, F, J., Wallnau, L, B. (1991).
Essentials Of Statistics For The Behavioral Sciences .
America:
West Pulishing Company.
Gaya MLA
Gravetter, Frederick., J., Wallnau, Larry, B..
"Essentials Of Statistics For The Behavioral Sciences".
America:
West Pulishing Company,
1991.
Text.