Syahna A, F., Wiyono, W. and Hakim, B.P. 2024. Perancangan Standard Operating Procedure (SOP) Audit Internal Berdasarkan Persyaratan ISO 9001:2015 dan ISO 14001:2015 Menggunakan Metode Business Process Improvement. VISA: Journal of Vision and Ideas. 4, 2 (Jul. 2024), 1158–1165. DOI:https://doi.org/10.47467/visa.v4i2.3444.