Sotelo, Fernando, Andrea Molina, and Katty Rojas. “Application of the Snowball Sample in the Diagnostic Based on Factors That Affect the Productivity of Cherimoya Production in MSEs: A Case of Study of Callahuanca and San Mateo De Otao, Peru”. Advances in Social Sciences Research Journal 5, no. 8 (August 9, 2018). Accessed December 3, 2024. http://804474.wannyin.cyou/index.php/ASSRJ/article/view/4948.