- The Official Parent's Sourcebook on Klinefelter Syndrome: A Revised and Updated Directory for the Internet Age by Icon Health Publications, 2002-08
- Klinefelter Syndrome: Personal and Professional Guide by Tessa McLannon, Probasco Gibbs, 1999-04
- Understanding Klinefelter syndrome a guide for XXY males and their families (SuDoc HE 20.3358:K 68) by Robert Bock, 1997
- Klinefelter Syndrome - A Bibliography and Dictionary for Physicians, Patients, and Genome Researchers by Philip M. Parker, 2007-07-18
- Gale Encyclopedia of Medicine: Klinefelter syndrome by Carin Lea Beltz MS, 2002-01-01
- Klinefelter's Syndrome - A Medical Dictionary, Bibliography, and Annotated Research Guide to Internet References by ICON Health Publications, 2004-01-23
- Klinefelter syndrome: An entry from Thomson Gale's <i>Gale Encyclopedia of Children's Health: Infancy through Adolescence</i> by Judith, MS Sims, Carin, MS Beltz, 2006
- A Psychiatric-Psychological Study of 50 Severly Hypogonadal Male Patients, Including 34 with Klinefelter's Syndrome, 47,xxy by Johannes et al Nielsen, 1969
- Klinefelter Syndrome: A Medical Dictionary, Bibliography, And Annotated Research Guide To Internet References by Icon Health Publications, 2004-04-30
- Klinefelter syndrome: An entry from Thomson Gale's <i>Gale Encyclopedia of Genetic Disorders, 2nd ed.</i> by Carin, MS Beltz, 2005
- Cholelithiasis in an infant with Klinefelter's syndrome.: An article from: Southern Medical Journal by Abdullah Al-Garni, Alexander K.C. Leung, et all 2002-09-01
- Transition to adult care in Turner's, Klinefelter's. (Patients Fall Through Health Care Cracks).: An article from: Internal Medicine News by Erik L. Goldman, 2002-08-15
- Klinefelter syndrome: The x-tra special boy by Diane Plumridge, 1982
- Klinefelter's Syndrome by H. J. Bandmann, R. Breit, 1984-10
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