Isen, Paula F.; Levin, Alice M. (1975). "Further Studies on the Effect of Feeling Good on Helping". Sociometry. 38 (1). American Sociological Association: 141–147. doi:10.2307/2786238. JSTOR2786238.
edpsycinteractive.org
Campbell, V.; Bond, R. (1982). "Evaluation of a Character Education Curriculum". In McClelland, D. (ed.). Education For Values. New York: Irvington Publishers. As described in Huitt, William (2004). "Moral and Character Development". Educational Psychology Interactive. Archived from the original on 8 April 2023. Retrieved 15 November 2013.
jstor.org
Isen, Paula F.; Levin, Alice M. (1975). "Further Studies on the Effect of Feeling Good on Helping". Sociometry. 38 (1). American Sociological Association: 141–147. doi:10.2307/2786238. JSTOR2786238.
"FM-62: Leader Development"(PDF). Department of the Army (U.S.). 30 June 2015. Retrieved 18 December 2016. This article incorporates text from this source, which is in the public domain.
Timpe, Kevin (9 October 2008). "Moral Character". Internet Encyclopedia of Philosophy. Retrieved 15 November 2013.
web.archive.org
Campbell, V.; Bond, R. (1982). "Evaluation of a Character Education Curriculum". In McClelland, D. (ed.). Education For Values. New York: Irvington Publishers. As described in Huitt, William (2004). "Moral and Character Development". Educational Psychology Interactive. Archived from the original on 8 April 2023. Retrieved 15 November 2013.