Gaya APA

B.S, A., AR, N. (2019). The Pocket Book of 16 Tenses (Cet. 2). Yogyakarta: Cakrawala.

Gaya MLA

B.S, Alexander., AR, Nina. "The Pocket Book of 16 Tenses". Cet. 2 Yogyakarta: Cakrawala, 2019. Text.