APA Citation

Rubin, G., & Sofia Mansoor. (2010). The happiness project: Proyek kebahagiaan. Jakarta: Gramedia Pustaka Utama.

Chicago Style Citation

Rubin, Gretchen, and Sofia Mansoor. The Happiness Project: Proyek Kebahagiaan. Jakarta: Gramedia Pustaka Utama, 2010.

MLA Citation

Rubin, Gretchen, and Sofia Mansoor. The Happiness Project: Proyek Kebahagiaan. Jakarta: Gramedia Pustaka Utama, 2010.

Warning: These citations may not always be 100% accurate.