Twenge, Jean M.; Sherman, Ryne A.; Wells, Brooke E. (February 1, 2017). "Sexual Inactivity During Young Adulthood Is More Common Among U.S. Millennials and iGen: Age, Period, and Cohort Effects on Having No Sexual Partners After Age 18". Archives of Sexual Behavior. 46 (2): 433–440. doi:10.1007/s10508-016-0798-z. PMID27480753. S2CID207092404.
Twenge, Jean M.; Sherman, Ryne A.; Wells, Brooke E. (February 1, 2017). "Sexual Inactivity During Young Adulthood Is More Common Among U.S. Millennials and iGen: Age, Period, and Cohort Effects on Having No Sexual Partners After Age 18". Archives of Sexual Behavior. 46 (2): 433–440. doi:10.1007/s10508-016-0798-z. PMID27480753. S2CID207092404.
Twenge, Jean M.; Sherman, Ryne A.; Wells, Brooke E. (February 1, 2017). "Sexual Inactivity During Young Adulthood Is More Common Among U.S. Millennials and iGen: Age, Period, and Cohort Effects on Having No Sexual Partners After Age 18". Archives of Sexual Behavior. 46 (2): 433–440. doi:10.1007/s10508-016-0798-z. PMID27480753. S2CID207092404.