Hough, Sigmund (2009). "Simon LeVay and Janice Baldwin: Human Sexuality, Third Edition". Sexuality and Disability. 27 (3): 179–180. doi:10.1007/s11195-009-9128-x. S2CID142790999.
Hough, Sigmund (2009). "Simon LeVay and Janice Baldwin: Human Sexuality, Third Edition". Sexuality and Disability. 27 (3): 179–180. doi:10.1007/s11195-009-9128-x. S2CID142790999.