APA Style
Why? : Happy Science 2. (2010).
Jakarta:
Elex Media Komputindo.
Chicago Style
Why? : Happy Science 2.
2.
Jakarta:
Elex Media Komputindo,
2010.
Text.
MLA Style
Why? : Happy Science 2.
2.
Jakarta:
Elex Media Komputindo,
2010.
Text.
Turabian Style
Why? : Happy Science 2.
Jakarta:
Elex Media Komputindo,
2010.
Print.