1. Young Women's Degree of Control over First Intercourse: An Exploratory Analysis
2. Sexual activity and contraceptive use among teenagers in the United States, 2011–2015;Abma J. C.;National Health Statistics Reports,2017
3. Centers for Disease Control and Prevention. (2016).Trends in the prevalence of sexual behaviors and HIV testing—National YRBS: 1991–2015. Retrieved September 9 2018 fromhttps://www.cdc.gov/healthyyouth/data/yrbs/pdf/trends/2015_us_sexual_trend_yrbs.pdf