Gaya APA
Cheryl, 1, S, L, 2, G.
(2013).
Essay Writing English For Academic Purposes
(
ed. 2)
.
Yogyakarta:
Andi.
Gaya MLA
Cheryl, 1., Sutanto, Leo, 2., Groth.
"Essay Writing English For Academic Purposes".
ed. 2
Yogyakarta:
Andi,
2013.
Text.