Retno Fajar Kusdiyanti, Ravik Karsidi, and Sugihardjo. 2019. “Farmers’ Participation on Rice, Corn, and Soybeans Enhancement Production Food Self-Sufficiency Program at Juwangi District Boyolali Regency”. Advances in Social Sciences Research Journal 6 (11):9-14. https://journals.scholarpublishing.org/index.php/ASSRJ/article/view/7310.