Gaya APA

kirkpatrick, L, A., Feeney, B, C. (2012). A Simple guide to IBM SPSS Statistics for Versions 18.0 (-). USA: Wadsworth.

Gaya MLA

kirkpatrick, Lee, A., Feeney, Brooke, C. "A Simple guide to IBM SPSS Statistics for Versions 18.0". - USA: Wadsworth, 2012. Text.