Cita APA (7th ed.)
The Origins of Happiness: The Science of Well-Being Over the Life Course. Princeton University.
Cita Chicago (17th ed.)
The Origins of Happiness: The Science of Well-Being Over the Life Course. Nueva Jersey, EUA: Princeton University.
Cita MLA (9th ed.)
The Origins of Happiness: The Science of Well-Being Over the Life Course. Princeton University.
Atenció: Aquestes cites poden no estar 100% correctes.