Villar, A. S. (2008). Coping with down's syndrome. Smart Parenting.
Chicago Style aipamenaVillar, Anna Santos. "Coping with Down's Syndrome." Smart Parenting 2008.
MLA aipamenaVillar, Anna Santos. "Coping with Down's Syndrome." Smart Parenting, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.