APA Style

Nasution, S. (2019, 2016, 2014, 20). Metode Research (Penelitian Ilmiah) (Cet. 14). Jakarta: Bumi Aksara.

MLA Style

Nasution, S.. "Metode Research (Penelitian Ilmiah)". Cet. 14 Jakarta: Bumi Aksara, 2019, 2016, 2014, 20. Text.