Husni Ayustia, and Selamat Pohan. “ISLAMIC CHARACTER DEVELOPMENT STRATEGY THROUGH 5S CULTURE (SMILE, GREETING, SALAM, POLITE, COURTESY) FOR STUDENTS AT SMP MUHAMMADIYAH 07 MEDAN”. MORFAI JOURNAL 5, no. 1 (March 3, 2025): 241–244. Accessed March 9, 2025. http://radjapublika.com/index.php/MORFAI/article/view/2565.