APA (7th ed.) Citation

Ōkawa, R. (2009). The science of happiness: 10 principles for manifesting your divine nature. Destiny Books.

Chicago Style (17th ed.) Citation

Ōkawa, Ryūhō. The Science of Happiness: 10 Principles for Manifesting Your Divine Nature. Rochester, Vt: Destiny Books, 2009.

MLA (9th ed.) Citation

Ōkawa, Ryūhō. The Science of Happiness: 10 Principles for Manifesting Your Divine Nature. Destiny Books, 2009.