Guspa, Anindra, Wildan Haru Pradani, Aflah Zakinov Irta, and Amin Akbar. “Article RETRACTED Due to Malpractice When the Audience Matters: A Systematic Review of Spectator Influence on Sports Performance”. Retos 70 (July 16, 2025): 921–930. Accessed November 7, 2026. https://www.revistaretos.org/index.php/retos/article/view/116288.