Gaya APA

Riyanto, S. (2009). Gateway English For Active Communication (Ed.1; Cet.1). Yogyakarta: Pustaka Pelajar.

Gaya MLA

Riyanto, Slamet. "Gateway English For Active Communication". Ed.1; Cet.1 Yogyakarta: Pustaka Pelajar, 2009. Text.