Tume Atua, T., Lateef Dahham, D., & Salim Mesr, I. (2019). The Role of Quality of Service as a Tool to Achieve Relationship Marketing. An Empirical Study of a Sample of Mobile Phone Company (Asiacell) Customers in Anbar Governorate. OpciĆ³n, 35, 1173-1198. Recuperado a partir de https://www.produccioncientificaluz.org/index.php/opcion/article/view/31944