Créditos fotográficos, além do autor:
Douglass AB, Gonsalves W, Maier R, Silk H, Stevens N, Tysinger JW, Wrightson AS. Smiles for Life: A National Oral Health Curriculum for Family Medicine. Society of Teachers of Family Medicine. 2005.
American Academy of Pediatric Dentistry, P&G Oral Health Products, Smiles for Tomorrow.