Gaya APA
Sutarno, L., Groth, C.
(2013).
Essay Writing: English for academic purpose
(
Ed. 2)
.
Yogyakarta:
Andi.
Gaya MLA
Sutarno, Leo., Groth, Cherlyl.
"Essay Writing: English for academic purpose".
Ed. 2
Yogyakarta:
Andi,
2013.
Text.