PERMATASARI, E.; SAVITRI, C.; FADDILA , S. P. EFFECTIVENESS OF ONE DAY PROMO IN INCREASING SALES OF NPK FERTILIZER PRODUCTS 30-6-8 IN PT. XYZ. Jurnal Mantik, [S. l.], v. 6, n. 1, p. 771-776, 2022. Disponível em: https://iocscience.org/ejournal/index.php/mantik/article/view/2371. Acesso em: 12 may. 2026.