Badaoui , Mohamed, Abdelhamid Naidjat, and Abulkasem Hamdi. 2019. “Analysis of Mediation in Marketing Research (Impact of Perceived Quality on Customers Loyalty - Mobilis Agency – Laghouat)”. The Arab Journal of Administration 39 (2). Cairo:237-52. https://doi.org/10.21608/aja.2019.36111.