Siallagan S, Napitupulu E. PENGARUH MODEL PEMBELAJARAN PERSONALIZED SYSTEM OF INSTRUCTION TERHADAP HASIL BELAJAR DPIB SMK NEGERI 5 MEDAN. STRATEGI [Internet]. 2025Dec.30 [cited 2026Apr.3];5(4):860-8. Available from: https://www.jurnalp4i.com/index.php/strategi/article/view/8175