Gaya APA

Sihimbing, L., Sianipar, R, T. (2018). English for Student of Christian Institution . Tarutung: IAKN Taruntung Press.

Gaya MLA

Sihimbing, Lince., Sianipar, Rafita, Tioria. "English for Student of Christian Institution". Tarutung: IAKN Taruntung Press, 2018. Text.