Lencioni, Patrick M. “Make Your Values Mean Something.” Harvard Business Review, 1 Aug. 2014, https://hbr.org/2002/07/make-your-values-mean-something.
“NPS Core Values.” National Parks Service, U.S. Department of the Interior, 4 June 2018, https://mylearning.nps.gov/library-resources/nps-core-values/.
