Differences in Knowledge Before and After Counseling on Sex Education to Students at SMA Negeri 1 Kampar Timur Riau Province (Tyagita Widya Sari & Putri Octia Hairani , Trans.). (2021). Jurnal Indah Sains Dan Klinis, 2(2), 18-21. https://doi.org/10.52622/jisk.v2i2.20