Gaya APA
Heo, Soon-Bong. (2010).
Why?enviroment .
Jakarta:
Elex Media Komputindo.
Gaya Chicago
Heo, Soon-Bong.
Why?enviroment.
Jakarta:
Elex Media Komputindo,
2010.
Text.
Gaya MLA
Heo, Soon-Bong.
Why?enviroment.
Jakarta:
Elex Media Komputindo,
2010.
Text.
Gaya Turabian
Heo, Soon-Bong.
Why?enviroment.
Jakarta:
Elex Media Komputindo,
2010.
Print.