Gaya APA

Trihendradi, C., suyantoro, S. (2009). Step by Step SPSS16: Analisis data statistik (Ed. 2). Gorontalo: ANDI.

Gaya MLA

Trihendradi, C.., suyantoro, Sigit. "Step by Step SPSS16: Analisis data statistik". Ed. 2 Gorontalo: ANDI, 2009. Text.