Sandopart, Dewa Putu Yohanes Agata L. “The Influence of Cristiano Ronaldo’s Individual Record Achievements on Sponsor Firms’ Abnormal Stock Returns: A Case Study of Nike and Herbalife”. Journal of Economics and Management 1, no. 3 (December 30, 2023): 163–174. Accessed September 23, 2026. https://ejournal.publine.or.id/index.php/ecoma/article/view/499.