GYNASTIAR, Khotib. The effect of price and promotion on distributor purchase interest in ZA Plus Fertilizer PT Petrokimia Gresik. International Management Conference and Progressive Papers, [S. l.], v. 2, n. 1, p. 54–62, 2024. Disponível em: https://proceeding.unesa.ac.id/index.php/immersive/article/view/4077. Acesso em: 24 feb. 2025.