Diyanto, Kiki, Donny Yudha Kusuma, and Tri Rustiadi. 2018. “Correlation Anxiety, Self Confidence and Motivation Toward Athlete’s Performance of Tunas Volleyball Club Pekalongan”. Journal of Physical Education and Sports 7 (1), 7-12. https://doi.org/10.15294/jpes.v7i1.21237.