Ōkawa, R. (2009). The science of happiness: 10 principles for manifesting your divine nature. Destiny Books.
Chicago Style (17th ed.) CitationŌkawa, Ryūhō. The Science of Happiness: 10 Principles for Manifesting Your Divine Nature. Rochester, Vt: Destiny Books, 2009.
MLA (9th ed.) CitationŌkawa, Ryūhō. The Science of Happiness: 10 Principles for Manifesting Your Divine Nature. Destiny Books, 2009.
Warning: These citations may not always be 100% accurate.