Cram, Jack. “Roth, Robert H., Hershenson, David B. & Hilliard, Thomas. (1970) <i>The Psychology of Vocational Development< I>”;. Canadian Journal of Counselling and Psychotherapy 6, no. 3 (June 1, 1972). Accessed December 27, 2025. https://jhistsex.org/index.php/rcc/article/view/60883.