Garzón Díaz, Walter, Griselda Reyes Macís, and Frank Salazar Solano. “Sales System for Sánchez Bookstore, Siuna, 2016”. University Journal of the Caribbean 19, no. 2 (October 31, 2018): 47-55. Accessed April 10, 2025. https://revistas.uraccan.edu.ni/index.php/Caribe/article/view/488.