Riordan, J; Countryman, BA (July–August 1980), "Basics of breastfeeding. Part I: Infant feeding patterns past and present.", JOGN Nursing, 9 (4): 207–210, doi:10.1111/j.1552-6909.1980.tb02778.x, PMID7001126
"Breastfeeding Statistics". LLLI Center for Breastfeeding Information. September 15, 2003. Archived from the original on May 19, 2015. Retrieved January 26, 2007.
Riordan, J; Countryman, BA (July–August 1980), "Basics of breastfeeding. Part I: Infant feeding patterns past and present.", JOGN Nursing, 9 (4): 207–210, doi:10.1111/j.1552-6909.1980.tb02778.x, PMID7001126
"Rates of Breastfeeding"(PDF). Canadian Perinatal Health Report 2003. Archived from the original(PDF) on November 16, 2009. Retrieved January 26, 2007.
"Rates of Breastfeeding"(PDF). Canadian Perinatal Health Report 2003. Archived from the original(PDF) on November 16, 2009. Retrieved January 26, 2007.
"Breastfeeding Statistics". LLLI Center for Breastfeeding Information. September 15, 2003. Archived from the original on May 19, 2015. Retrieved January 26, 2007.