David A. Levy, James E. Parco, and Sarah R. Spears. “Purple in a Black & White World: Self-Determination Theory and Transgender Military Service”. Journal of Basic & Applied Sciences 11 (January 5, 2015): 359–369. Accessed April 29, 2025. http://sceintific-array.org/index.php/jbas/article/view/1320.