Pamela Giovannelli, and Cristina Bandeira. 2023. “Physical Education Programmes Improve Sportsman’s Motivation, Attitude, and Self-Efficacy: A Mixed Methods Study in Germany”. Revista De Psicología Del Deporte (Journal of Sport Psychology) 32 (3):200-211. https://rpd-online.com/index.php/rpd/article/view/1402.