Dharmazie Dwi Ilham, Mesra B, Elfitra Desy Surya. ANALYSIS OF INTERNAL COMMUNICATION AND WORK SYSTEMS ON WORK PRODUCTIVITY WITH MOTIVATION AS AN INTERVENING VARIABLE IN THE OFFICE HEAD OF MEDAN BELAWAN DISTRICT. MORFAI [Internet]. 2025 Jul. 31 [cited 2025 Oct. 23];4(4):1848-55. Available from: https://radjapublika.com/index.php/MORFAI/article/view/3657