1. Altshuler GP. Chapter 50. The Placenta. In: Mills SE, ed. Sternberg's Diagnostic Surgical Pathology. Philadelphia, PA: Lippincott Williams and Wilkins; 2004: 2301-2332.
2. Baergen, RN. Manual of Benirschke and Kaufmann's Pathology of the Human Placenta. New York, NY: Springer Science & Business Media; 2005.
3. Benirschke K, Kaufmann P, Baergen RN. Pathology of the Human Placenta. 5th ed. New York, NY: Springer Science & Business Media; 2006.
4. Faye-Petersen OM, Heller DS, Joshi VV. Handbook of Placental Pathology. 2nd ed. New York, NY: Taylor and Francis; 2006.
5. Fox H, Sebire NJ. Patholgy of the Placenta. 3rd ed. Philadelphia, PA: Saunders; 2007.