Gaya APA
Cho, Young - Sun. (2010).
Why? : happy science 2 .
Jakarta:
PT Elex Media Komputindo.
Gaya Chicago
Cho, Young - Sun.
Why? : happy science 2.
Jakarta:
PT Elex Media Komputindo,
2010.
Text.
Gaya MLA
Cho, Young - Sun.
Why? : happy science 2.
Jakarta:
PT Elex Media Komputindo,
2010.
Text.
Gaya Turabian
Cho, Young - Sun.
Why? : happy science 2.
Jakarta:
PT Elex Media Komputindo,
2010.
Print.