Gaya APA
Heo, Soon Bong. (2010).
Why ? happy science 6 .
Jakarta:
Elex Media Komputindo.
Gaya Chicago
Heo, Soon Bong.
Why ? happy science 6.
Jakarta:
Elex Media Komputindo,
2010.
Text.
Gaya MLA
Heo, Soon Bong.
Why ? happy science 6.
Jakarta:
Elex Media Komputindo,
2010.
Text.
Gaya Turabian
Heo, Soon Bong.
Why ? happy science 6.
Jakarta:
Elex Media Komputindo,
2010.
Print.