Gaya APA
Leo, sutanto. (2007).
English For Academic purpose Essay Writing .
Yogyakarta:
.
Gaya Chicago
Leo, sutanto.
English For Academic purpose Essay Writing.
Yogyakarta:
,
2007.
Text.
Gaya MLA
Leo, sutanto.
English For Academic purpose Essay Writing.
Yogyakarta:
,
2007.
Text.
Gaya Turabian
Leo, sutanto.
English For Academic purpose Essay Writing.
Yogyakarta:
,
2007.
Print.