فهرس المقالات Roya Shakeri المقاله 1 - Presenting a Systemic Model for the Effectiveness of Marketing Communication Activities in Social Networks 20.1001.1.23222301.2023.9.2.9.0 10.30495/jsm.2023.1972982.1715 Somayyeh Abesh Loui Aghdam heirsh soltanpanah Omid Mahdieh Roya Shakeri Foad Habibi Journal of System Management , العدد 2 , السنة 9 , بهار 2023