Gaya APA

Nasution, S. (2011). Metode research (penelitian research) : usul tesis, desain penelitian, hipotesis, validitas, sampling, populasi, observasi, wawancara, angket (ed.1cet.12). Jakarta: Bumi Aksara.

Gaya MLA

Nasution, S. "Metode research (penelitian research) : usul tesis, desain penelitian, hipotesis, validitas, sampling, populasi, observasi, wawancara, angket". ed.1cet.12 Jakarta: Bumi Aksara, 2011. Text.