Gachi, khaled. “The Contribution of Marketing Innovation in the Development of Competitive Advantage of Modern Business Organizations: A Study of Sweetly Organization in Djelfa, Algeria”. Dirassat Journal Economic Issue 6, no. 1 (January 1, 2015): 187-206. Accessed November 23, 2024. http://journals.lagh-univ.dz/index.php/djei/article/view/365.