SIHOMBING, S.; SITANGGANG, D. ANALISIS DESAIN PRODUK DAN JASA. Jurnal Riset Akuntansi & Keuangan, [S. l.], v. 4, n. 2, p. 137–156, 2019. Disponível em: https://ejournal.ust.ac.id/index.php/JRAK/article/view/456. Acesso em: 6 may. 2024.