Varona, L. L. (2012). Cow's milk allergy vs. lactose intolerance. IN Dear Doctor [column]. Health & Home.
Chicago-viite (17. p.)Varona, Linda Lim. "Cow's Milk Allergy Vs. Lactose Intolerance. IN Dear Doctor [column]." Health & Home 2012.
MLA-viite (9. p.)Varona, Linda Lim. "Cow's Milk Allergy Vs. Lactose Intolerance. IN Dear Doctor [column]." Health & Home, 2012.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.