1. AHRQ report. Agency for Healthcare Research and Quality Breastfeeding and Maternal and Infant Health Outcomes in Developed Countries Number 153 April 2007. Rockville MD.
2. American Academy of Pediatrics: Red Book, 26th ed. 2003 Report of the Committee on Infectious Diseases. AAP, Elk Grove Ill, 2003, p 63.
3. Infant feeding practices of families belonging to a prepaid group practice health care plan;Andrew;Pediatrics,1980
4. Mothers and medicine: A social history of infant feeding, 1890-1950;Apple,1987