1. ACOG Practice Bulletin No. 40: Shoulder dystocia;American College of Obstetricians and Gynecologists (ACOG);Obstetrics & Gynecology,2002
2. Retrieved from http://journals.lww.com/greenjournal/Abstract/2002/11000/ACOG_Practice_Bulletin_No__40__Shoulder_Dystocia.42.aspx
3. ACOG Practice Bulletin No. 33: Diagnosis and management of preeclampsia and eclampsia;American College of Obstetricians and Gynecologists (ACOG);Obstetrics & Gynecology,2002
4. ACOG Practice Bulletin No. 76: Postpartum hemorrhage;American College of Obstetricians and Gynecologists (ACOG);Obstetrics & Gynecology,2006
5. ACOG Practice Bulletin No. 100: Critical care in pregnancy;American College of Obstetricians and Gynecologists (ACOG);Obstetrics & Gynecology,2009