Sleep Medicine. Nelson Textbook of Pediatrics, 19th ed. Robert M. Kliegman, MD, Bonita M.D. Stanton, MD, Joseph St. Geme, Nina Schor, MD, PhD and Richard E. Behrman, MD. Elsevier. 2011. Chapter 17. Accessed 8/3/11 from http://www.mdconsult.com/books/page.do?eid=4-u1.0-B978-1-4377-0755-7..00017-8&isbn=978-1-4377-0755-7&uniqId=270704203-6#4-u1.0-B978-1-4377-0755-7..00017-8--s0010
"Sleep Practices And Tips For Children." Sleep for Kids. National Sleep Foundation. Accessed 8/3/11 from <http://www.sleepforkids.org/html/practices.html>.
HealthyChildren.org. Ages and Stages: Baby Sleep. http://www.healthychildren.org/English/ages-stages/baby/sleep/Pages/default.aspx (accessed 9/6/11).