Boe, O. ., R. . Säfvenbom, R. B. . Johansen, and R. . Buch. “The Relationship Between Self-Concept, SelfEfficacy, and Military Skills and Abilities”. International Journal of Learning, Teaching and Educational Research, vol. 17, no. 10, Oct. 2018, pp. 18-42, http://ijlter.net/index.php/ijlter/article/view/631.