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Dewinny Septalia Dale, Intan Maharani, Hamidah Sari Batubara, Andriani. The Effectiveness of The Teenagers’ Friends Website Educational Media to Improve Teenagers’ Knowledge About Free Sex at State Vocational School 8 Pekanbaru. JIK-MC [Internet]. 2026 Feb. 19 [cited 2026 Jun. 14];5(2):115-23. Available from: https://journal.mandiracendikia.com/index.php/JIK-MC/article/view/2141