Purwandi, Nadya YuliaKristi, and Erma Retnaningtyas. “Hubungan Pengetahuan Remaja Tentang Seks Education Terhadap Pergaulan Bebas Di SMPN 7 Desa Simpang 1”. Journal of Health Science Community, vol. 1, no. 2, Nov. 2020, https://www.thejhsc.org/index.php/jhsc/article/view/95.