Gaya APA

S.Nasution, . (2014). Metode Research=Penelitian Ilmiah: Usul Tesis, Desain Penelitian, Hipotesis,Validitas,Sampling.Populasi,Observasi,Wawancara,Angket . Jakarta: Bumi Aksara.

Gaya MLA

S.Nasution, . "Metode Research=Penelitian Ilmiah: Usul Tesis, Desain Penelitian, Hipotesis,Validitas,Sampling.Populasi,Observasi,Wawancara,Angket". Jakarta: Bumi Aksara, 2014. textbook.