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Tume Atua T, Lateef Dahham D, Salim Mesr I. 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 [Internet]. 19 de octubre de 2019 [citado 2 de mayo de 2024];350:1173-98. Disponible en: https://produccioncientificaluz.org/index.php/opcion/article/view/31944