Gibbs R, Karlan B, Haney A, Nygaard I. Danforth’s Obstetrics and Gynecology. 9th ed. Lippincott Williams and Wilkins. 2008. Accessed November 13, 2011.
Katz V, Lentz G, Lobo R, Gershenson D. Comprehensive Gynecology. 5th ed. Mosby Elsevier, 2007.
Schorge J, Schaeffer J, Hoalvorson L, et al. Williams Gynecology. 1st ed. The McGraw Hill Companies, Inc. 2008.
Goldstein D, Laufer MR, et al. Congenital cervical anomalies and benign cervical lesions. Accessed October 11, 2015. http://www.uptodate.com/contents/congenital-cervical-anomalies-and-benign-cervical-lesions.