Não informado. (1973). Journal of nurse-midwifery. American College of Nurse-Midwives.
Chicago-referens (17:e uppl.)Não informado. Journal of Nurse-midwifery. New York: American College of Nurse-Midwives, 1973.
MLA-referens (8:e uppl.)Não informado. Journal of Nurse-midwifery. American College of Nurse-Midwives, 1973.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.