Wren-Lewis, S. (2019). The happiness problem: Expecting better in an uncertain world. Policy Press.
芝加哥风格引文Wren-Lewis, Sam. The Happiness Problem: Expecting Better in an Uncertain World. Bristol, UK ; Chicago, IL: Policy Press, 2019.
MLA引文Wren-Lewis, Sam. The Happiness Problem: Expecting Better in an Uncertain World. Policy Press, 2019.
警告：这些引文格式不一定是100％准确.