SONDAKH, P. C.; TUMBEL, T. M.; WALANGITAN, O. F. C. Pengaruh Harga dan Promosi Terhadap Keputusan Pembelian Kopi Kapal Api di Manado. Productivity, [S. l.], v. 4, n. 3, p. 437–443, 2023. Disponível em: https://ejournal.unsrat.ac.id/v3/index.php/productivity/article/view/48167. Acesso em: 17 jul. 2024.