Gaya APA

trihendradi, ., suyantoro, S. (2012). step by step SPSS 20 analisis data statistik (ed.1). yogyakarta: andi offset.

Gaya MLA

trihendradi, ., suyantoro, Sigit. "step by step SPSS 20 analisis data statistik". ed.1 yogyakarta: andi offset, 2012. Text.