Raihani, Hayatur, Henri Yanto Daulay, and Suparmi. “ANALISIS FUNGSI MANAJEMEN PADA KOPERASI PERDAGANGAN DAN JASA PRIMA UMEGA PEKANBARU”. Jurnal Agregat : Journal of Economic Education and Economics Business 3, no. 1 (June 17, 2022): 25-40. Accessed July 4, 2024. http://ejournal.stkipaisyiyahriau.ac.id/index.php/agregat/article/view/293.