Harper, P. A. (1962). Preventive pediatrics; child health and development. Appleton-Century-Crofts.
Lua i Stíl Chicago (17ú heag.)Harper, Paul A. Preventive Pediatrics; Child Health and Development. New York: Appleton-Century-Crofts, 1962.
Lua MLA (9ú heag.)Harper, Paul A. Preventive Pediatrics; Child Health and Development. Appleton-Century-Crofts, 1962.
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