Sihombing, Sarimonang, and Darna Sitanggang. “The Influence of Attitude and Subjective Norms on the Intention of People to Become a Makmur Bersama Credit Union Member in Paroki Hayam Wuruk Medan”. The International Journal of Humanities & Social Studies 8, no. 11 (November 30, 2020). Accessed May 19, 2024. http://www.internationaljournalcorner.com/index.php/theijhss/article/view/156756.