Situmorang, Lambok Nita, Lita Sri Andayani, and Linda T Maaas. “Association Between Perceived Seriousness, Cues to Action, and Voluntary Counseling and Testing Uptake in Men Who Have Sex With Men in Pematangsiantar, North Sumatera”. Journal of Health Promotion and Behavior 4, no. 2 (April 16, 2019): 121–125. Accessed April 29, 2024. https://thejhpb.com/index.php/thejhpb/article/view/200.