Warlenda, Sherly, Arief Wahyudi, and Zahra Siregar. “Determinants of Masturbation of Adolescent at Tapung Public High School 3 in the District of Kampar, 2017”. Jurnal Kesehatan Komunitas 4, no. 2 (December 30, 2018): 46-51. Accessed February 16, 2019. http://jurnal.htp.ac.id/index.php/keskom/article/view/257.