APA Style

Walters, J. Donald. (2002). Secrets of happiness = rahasia kebahagiaan . Jakarta: Elex Media Komputindo.

Chicago Style

Walters, J. Donald. Secrets of happiness = rahasia kebahagiaan. Jakarta: Elex Media Komputindo, 2002. Text.

MLA Style

Walters, J. Donald. Secrets of happiness = rahasia kebahagiaan. Jakarta: Elex Media Komputindo, 2002. Text.

Turabian Style

Walters, J. Donald. Secrets of happiness = rahasia kebahagiaan. Jakarta: Elex Media Komputindo, 2002. Print.