"The Effect of The Perceived Risk in post-purchase Stage on Brand Loyalty A survey Study to The Consumers of Domestic Shampoo Brands in Lattakia City". 2018. مجلة جامعة اللاذقية- سلسلة العلوم الاقتصادية والقانونية 39 (3). https://journal.latakia-univ.edu.sy/index.php/econlaw/article/view/3937.