884
George Vaillant, Triumphs of Experience: The Men of the Harvard Grant Study (Cambridge, MA: Belknap, 2012).
885
Цит. по Joshua Wolf Shenk, «What Makes Us Happy», The Atlantic, June 2009, по состоянию на 7 января 2017 года, .
886
George Vaillant, Triumphs of Experience: The Men of the Harvard Grant Study (Cambridge, MA: Belknap, 2012), 52.
887
Harry F. Harlow, «The Nature of Love», American Psychologist 13, no. 12 (1958): 673–685; также цит. по George Vaillant, Triumphs of Experience: The Men of the Harvard Grant Study (Cambridge, MA: Belknap, 2012), 64.
