Gaya APA

dkk, A, B, S. (2018). Teaching Language Skills: Preparing Materials and Selecting Techniques (Ed. 1). Yogyakarta: Graha Ilmu.

Gaya MLA

dkk, Ag., Bambang, Setiyadi,. "Teaching Language Skills: Preparing Materials and Selecting Techniques". Ed. 1 Yogyakarta: Graha Ilmu, 2018. Text.