APA (7th ed.) Citation

Sheena, A. (2013). Happiness Theory. Elf Books.

Chicago Style (17th ed.) Citation

Sheena, Arbie. Happiness Theory. Elf Books, 2013.

MLA (8th ed.) Citation

Sheena, Arbie. Happiness Theory. Elf Books, 2013.

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