World Health Organization/UNICEF. Protecting, Promoting and Supporting Breastfeeding: The Special Role of Maternity Services. A Joint WHO/UNICEF Statement. World Health Organization: Geneva, 1989.
National Resource Center for Health and Safety in Child Care and Early Education. Caring for Our Children: National Health and Safety Performance Standards; Guidelines for Early Care and Education Programs. 3rd. 2011. nrckids.org/CFOC3/PDFVersion/preventing_obesity.pdf. 2011 June 27.