Mochammad Singgih, and Joko Priyono. “Analisis Pengembangan Strategi Pemasaran Koperasi Karyawan (KopKar) Untag Surabaya”. Journal of Research and Technology 8, no. 1 (August 9, 2022): 15–28. Accessed July 14, 2024. https://journal.unusida.ac.id/index.php/jrt/article/view/628.