Cunningham F, Leveno K, Bloom S, et al. Williams Obstetrics, 22nd ed. The McGraw Hill Companies, Inc. 2008. Accessed March 31, 2010.
Gibbs R, Karlan B, Haney A, Nygaard I. Danforth’s Obstetrics and Gynecology. 9th ed. Lippincott Williams and Wilkins. 2008. Accessed June 27, 2012.
Lockwood CJ, Russo-Stieglitz K. Management of placenta previa. UpToDate. http://www.uptodate.com/contents/management-of-placenta-previa. Updated May 9, 2016. Accessed June 5, 2016.
Riley LE, Stark AR, et al, Eds. Guidelines for Perinatal Care. 7th ed. 2012. American Academy of Pediatrics. The American College of Obstetrics and Gynecologists.