WAZIS, Dr (Mrs) Ruth Haruna; IMAM, Dr Yagana; GASSOL, Abubakar Musa. “Strategies For Winning Customer In A Competitive Market Environment” (A Case Study Of Mtn Nigeria Ltd). International Journal Of Management And Economics Invention, [S. l.], v. 2, n. 09, p. 1023–1029, 2016. Disponível em: https://rajournals.in/index.php/ijmei/article/view/253. Acesso em: 23 dec. 2024.