Istriani RN, Rahardja S. Implementation Quality Management System of ISO 9001: 2015 at Vocational High School Yappi Wonosari Gunungkidul Regency. KSS [Internet]. 2019 Jun. 30 [cited 2025 Jul. 11];3(17):478–485. Available from: https://knepublishing.com/index.php/KnE-Social/article/view/4673