Gaya APA

Heo,Soon Bong, Irene, Christine, Morin,Tanang. (2010). WHY? Happy Science 5 . Jakarta: Elex Media.

Gaya Chicago

Heo,Soon Bong, Irene, Christine, Morin,Tanang. WHY? Happy Science 5. Jakarta: Elex Media, 2010. Text.

Gaya MLA

Heo,Soon Bong, Irene, Christine, Morin,Tanang. WHY? Happy Science 5. Jakarta: Elex Media, 2010. Text.

Gaya Turabian

Heo,Soon Bong, Irene, Christine, Morin,Tanang. WHY? Happy Science 5. Jakarta: Elex Media, 2010. Print.