Layard, R. (2005). Happiness: Lessons from a new science. Penguin Press.
Chicagoスタイル(17版)引用形式Layard, Richard. Happiness: Lessons from a New Science. New York: Penguin Press, 2005.
MLA(9版)引用形式Layard, Richard. Happiness: Lessons from a New Science. Penguin Press, 2005.
警告: この引用は必ずしも正確ではありません.