Gaya APA
Leo, Sutanto. (2009).
English for Academic Purpose : Essay Writing .
Yogyakarta:
Andi.
Gaya Chicago
Leo, Sutanto.
English for Academic Purpose : Essay Writing.
Yogyakarta:
Andi,
2009.
Text.
Gaya MLA
Leo, Sutanto.
English for Academic Purpose : Essay Writing.
Yogyakarta:
Andi,
2009.
Text.
Gaya Turabian
Leo, Sutanto.
English for Academic Purpose : Essay Writing.
Yogyakarta:
Andi,
2009.
Print.