Federici, Roger Andre, and Frode Moen. “The Coach-Athlete Relationship and Self-Determination: Assessing an Athlete Centered Scale in Sport”. International Journal of Learning, Teaching and Educational Research 7, no. 1 (August 30, 2014): 105–118. Accessed August 2, 2026. http://www.ijlter.myres.net/index.php/ijlter/article/view/1174.