Gálvez-Ruiz, P., M. Grimaldi-Puyana, J. Fernández-Gavira, and A. Jesús Sánchez-Oliver. 2018. “Application of the Generalizability Theory in the Services Evaluation in Sports Management”. SPORT TK-EuroAmerican Journal of Sport Sciences 7 (2):49-56. https://doi.org/10.6018/sportk.343101.