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