EKİNCİ, Nurullah Emir, et al. “Exploring Self - Confidence Level of High School Students Doing Sport ”. Sportif Bakış: Spor Ve Eğitim Bilimleri Dergisi, vol. 1, no. 1, Dec. 2014, pp. 36-42, https://sportifbakis.com/index.php/pub/article/view/264.