Gaya APA

Wardhana, K., Widyaputri, R. (2017). ABC English Grammar (Accurate, Brief, Complete) (-). Surabaya: Grahamedia Press.

Gaya MLA

Wardhana, Kunto., Widyaputri, Rini. "ABC English Grammar (Accurate, Brief, Complete)". - Surabaya: Grahamedia Press, 2017. Text.