بوبكر ي, قرفي ي. An Attempt of Projecting the Five Forces Model of Sector Profitability on Relationship Marketing and Customer Loyalty. fber [Internet]. 2021 Sep. 30 [cited 2024 Nov. 24];5(3):292-311. Available from: https://jiamcs.centre-univ-mila.dz/index.php/fber/article/view/1111