Layard, P. R. G. (2005). Happiness: Lessons from a new science. Penguin Press.
芝加哥风格引文Layard, P. R. G. Happiness: Lessons from a New Science. New York: Penguin Press, 2005.
MLA引文Layard, P. R. G. Happiness: Lessons from a New Science. Penguin Press, 2005.
警告：这些引文格式不一定是100％准确.