Gaya APA
Purwanto, SS. (2010).
English For It .
Yogyakarta:
Ardana Media.
Gaya Chicago
Purwanto, SS.
English For It.
Yogyakarta:
Ardana Media,
2010.
Text.
Gaya MLA
Purwanto, SS.
English For It.
Yogyakarta:
Ardana Media,
2010.
Text.
Gaya Turabian
Purwanto, SS.
English For It.
Yogyakarta:
Ardana Media,
2010.
Print.