Gaya APA

Leech, N, L. (2005). SPSS For Intermediate Statistics: use and interpretation (Ed. 2). New Jersey: Lawrence Erlbaum Associates.

Gaya MLA

Leech, Nancy, L. "SPSS For Intermediate Statistics: use and interpretation". Ed. 2 New Jersey: Lawrence Erlbaum Associates, 2005. Psikologi S-1.