Ledford, A., C. R. Luning, P. Miles, D. Dixon, and S. Lynch. “Investigating the Measurement Of, and Interrelationship Between Resilience, Hardiness, Grit in a Population of Navy SEAL Candidates”. American Journal of Management, vol. 21, no. 2, June 2021, doi:10.33423/ajm.v21i2.4229.