Fauzani AR, Ampera D. Development video media using study strategies groups for facial skin care learning not problems beauty cosmetology SMK Negeri 3 Pematang Siantar. JPTK [Internet]. 30May2023 [cited 3Jul.2024];6(2):106-12. Available from: http://jptk.ppj.unp.ac.id/index.php/jptk/article/view/330