Gaya APA

Putrawan, G, E., Nurweni, A. (2018). Essentials Of English (Ed.1, Cet.1). Yogyakarta: Graha Ilmu.

Gaya MLA

Putrawan, Gede, Eka., Nurweni, Ari. "Essentials Of English". Ed.1, Cet.1 Yogyakarta: Graha Ilmu, 2018. Text.