Burris, J. L., Brechting, E. H., Salsman, J., & Carlson, C. R. (1969). Factors associated with the psychological well-being and distress of university students. Journal Of American College Health : J Of Ach, 57(5), 536-43. https://doi.org/10.3200/JACH.57.5.536-544 (Original work published 1969)