Chandra R, Syahril S, Ambiyar A, Refdinal R. The Validity of Video Tutorials CNC/CAM for Learning in the Machining Engineering Department of Vocational High Schools . jppipa, pendidikan ipa, fisika, biologi, kimia [Internet]. 2023 Dec. 25 [cited 2025 Apr. 10];9(SpecialIssue):836-42. Available from: https://jppipa.unram.ac.id/index.php/jppipa/article/view/6109