Child Welfare League of America. Committee on Standards for Day Care Service. (1960). Child Welfare League of America standards for day care service. Child Welfare League of America.
Cita Chicago (17th ed.)Child Welfare League of America. Committee on Standards for Day Care Service. Child Welfare League of America Standards for Day Care Service. N.Y.: Child Welfare League of America, 1960.
Cita MLA (8th ed.)Child Welfare League of America. Committee on Standards for Day Care Service. Child Welfare League of America Standards for Day Care Service. Child Welfare League of America, 1960.
Atenció: Aquestes cites poden no estar 100% correctes.