Rudiyanto, Heru. “The Study of Good Manufacturing Practices (GMP) and Good Quality Wingko Based on SNI-01-4311-1996”. JURNAL KESEHATAN LINGKUNGAN 8, no. 2 (July 5, 2016): 148–157. Accessed August 3, 2024. https://e-journal.unair.ac.id/JKL/article/view/8007.