DJOUBEROU J-L, SAIDOU V, FOUDA OMGBA NSI AL. EFFECTIVENESS OF MARKETING-MIX STRATEGIES ON CUSTOMERS OF FITNESS ESTABLISHMENTS. PILOT AND PRELIMINARY STUDY IN THE CITY OF YAOUNDE (CAMEROON). Revue ISG [Internet]. 2022May1 [cited 2024Jul.3];5(2). Available from: https://revue-isg.com/index.php/home/article/view/913