1. The System of Professions;Abbott,1988
2. American College of Nurse-Midwives Statement on Home Births;American College of Nurse-Midwives,1973
3. Membership Estimates;American College of Nurse-Midwives,1995
4. Immaculate Deception: A New Look at Women and Childbirth in America;Arms,1975
5. Theorizing Women's Work;Armstrong,1990