Cevallos, C. E. S., Rodríguez, I. D. J., & Santana, L. del C. G. 2021. “Financial Evaluation of Annatto Paste Production from Ancestral Knowledge in Manta Blanca”. International Journal of Economic Perspectives 15 (1):38-48. https://ijeponline.com/index.php/journal/article/view/242.