Gaya APA

Sarwono, J., Purwanto, Y. (2013). English for academic Purposes : A Susccesful Way to Learn Scientific English (ed. 1). YOGYAKARTA: ANDI.

Gaya MLA

Sarwono, Jonathan., Purwanto, Yudhy. "English for academic Purposes : A Susccesful Way to Learn Scientific English". ed. 1 YOGYAKARTA: ANDI, 2013. Text.