Gaya APA

Riyanto, S. (2011). 12 (Twelve) Tenses to Master in A Day With Examples (Cet.1). Yogyakarta: Pustaka Pelajar.

Gaya MLA

Riyanto, Slamet. "12 (Twelve) Tenses to Master in A Day With Examples". Cet.1 Yogyakarta: Pustaka Pelajar, 2011. Textbook.