Gaya APA

Nasution, M, F., Fachruddin, . (1993). Penelitian praktis (1). Medan: Pustaka Widyasarana.

Gaya MLA

Nasution, M., Farid., Fachruddin, . "Penelitian praktis". 1 Medan: Pustaka Widyasarana, 1993. Text.