Gaya APA
Heo,Soon Bong. (2010).
Why ? happy science 5 .
Jakarta:
Elex Media Komputindo.
Gaya Chicago
Heo,Soon Bong.
Why ? happy science 5.
Jakarta:
Elex Media Komputindo,
2010.
Text.
Gaya MLA
Heo,Soon Bong.
Why ? happy science 5.
Jakarta:
Elex Media Komputindo,
2010.
Text.
Gaya Turabian
Heo,Soon Bong.
Why ? happy science 5.
Jakarta:
Elex Media Komputindo,
2010.
Print.