Não informado. (1970). Child, Care Health and Development. Blackwell Scientific Publications.
Lua i Stíl Chicago (17ú heag.)Não informado. Child, Care Health and Development. Oxford, Inglaterra: Blackwell Scientific Publications, 1970.
Lua MLA (8ú heag.)Não informado. Child, Care Health and Development. Blackwell Scientific Publications, 1970.
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