Simbolon, Sabam. “Analisa Keberadaan Koperasi Di Kabupaten Tangerang”. Primanomics : Jurnal Ekonomi & Bisnis 16, no. 1 (February 26, 2018): 89–102. Accessed December 21, 2024. https://jurnal.ubd.ac.id/index.php/PE/article/view/55.