Zulvera, Zulvera, Sumardjo Sumardjo, Margono Slamet, and Basita Ginting. “Factors Influencing the Adoption of the Organic Vegetable Farming System in Agam and Tanah Datar Districts of West Sumatra”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 26, no. 1 (November 7, 2016): 425–432. Accessed July 23, 2024. https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/6533.