Gaya APA
Sutan Leo, dkk. (2007).
English for Academic Purpose Essay Writing .
YOGYAKARTA:
PN ANDI.
Gaya Chicago
Sutan Leo, dkk.
English for Academic Purpose Essay Writing.
YOGYAKARTA:
PN ANDI,
2007.
Text.
Gaya MLA
Sutan Leo, dkk.
English for Academic Purpose Essay Writing.
YOGYAKARTA:
PN ANDI,
2007.
Text.
Gaya Turabian
Sutan Leo, dkk.
English for Academic Purpose Essay Writing.
YOGYAKARTA:
PN ANDI,
2007.
Print.