„EFFECTIVENESS OF MARKETING-MIX STRATEGIES ON CUSTOMERS OF FITNESS ESTABLISHMENTS. PILOT AND PRELIMINARY STUDY IN THE CITY OF YAOUNDE (CAMEROON)” (2022) Revue Internationale des Sciences de Gestion, 5(2). Disponibil la: https://revue-isg.com/index.php/home/article/view/913 (Data accesării: 23 octombrie 2026).