9Diener E, Scollon CN, Lucas RE. The evolving concept of subjective well -being: the multifaceted nature of happiness [J] . Advances in Cell Aging and Gerontology, 2003 (15): 187-219.
10Abdel - Khalek AM. Measuring happiness with a single - item scale [J]. Soc Behav Pers, 2006, 34 (2) : 139 - 150.