APA (7th ed.) Citation

Rubin, G. (2009). The happiness project. HarperCollins Publisher, London.

Chicago Style (17th ed.) Citation

Rubin, Gretchen. The Happiness Project. HarperCollins Publisher, London, 2009.

MLA (9th ed.) Citation

Rubin, Gretchen. The Happiness Project. HarperCollins Publisher, London, 2009.

Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.