[1]
Sembiring, S.M.B. 2021. The effectiveness of buzz group disscussionon knowledge and attitudes about prannal sex in adolescents at vocational school of pencawan medan. International journal of health & medical sciences. 4, 1 (Feb. 2021), 56-60. DOI:https://doi.org/10.31295/ijhms.v4n1.775.