Gaya APA

Riyanto, S. (2011). 12 Tenses to MAster in a Day : with examples (cet.1). : Pustaka Pelajar.

Gaya MLA

Riyanto, S.. 12 Tenses to MAster in a Day : with examples. cet.1 : Pustaka Pelajar, 2011. Textbook.