Gaya APA
Sarwono, J., Purwanto, Y.
(2013).
English for ACADEMIC PURPOSES
.
Yogyakarta:
Andi offset.
Gaya MLA
Sarwono, Jonathan., Purwanto, Yudhy.
"English for ACADEMIC PURPOSES".
Yogyakarta:
Andi offset,
2013.
Text.