TANJUNG, K. R. Influence of entrepreneurial and marketing behavior on the income of the photocopying business of Palano Jaya Medan Helvetia. Digital Business: Tren Bisnis Masa Depan, [S. l.], v. 13, n. 1, p. 20–26, 2022. DOI: 10.59651/digital.v13i1.25. Disponível em: https://ejournal.cria.or.id/index.php/db/article/view/25. Acesso em: 14 may. 2026.