HAMSAL, H.; BUDI HERMANTO. Analisis Biaya Produksi, Pendapatan, Efisiensi Dan Nilai Tambah Terhadap Pemasaran Pada Usaha Dagang . Management Studies and Entrepreneurship Journal (MSEJ), [S. l.], v. 3, n. 1, p. 254–272, 2022. DOI: 10.37385/msej.v3i1.442. Disponível em: https://www.yrpipku.com/journal/index.php/msej/article/view/442. Acesso em: 6 jul. 2025.