Warphana A, Sukardi T. Implementation of Occupational Health and Safety in State Vocational Schools of TKBB Expertise Competency in Yogyakarta . KSS [Internet]. 2019 Jun. 30 [cited 2025 Jul. 11];3(17):62–70. Available from: https://knepublishing.com/index.php/KnE-Social/article/view/4624