Erniati, Erniati. “Level of Education, Knowledge, Attitude Sellers Meatballs and Borax Used in Meatballs in Lemahputro III Elementary School”. JURNAL KESEHATAN LINGKUNGAN 9, no. 2 (July 27, 2018): 209–216. Accessed August 3, 2024. https://e-journal.unair.ac.id/JKL/article/view/9191.