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Lua i Stíl Chicago (17ú heag.)Duyff, Roberta Larson, Susan Giarratano-Russell, agus Mary F. Zuzich. Nutrition, Health, and Safety for Preschool Children. New York: Glencoe, 1995.
Lua MLA (8ú heag.)Duyff, Roberta Larson, et al. Nutrition, Health, and Safety for Preschool Children. Glencoe, 1995.
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