APA
United States. Department of Health Education and Welfare. Social Se curity Administration. Children's Bureau, . (1960). Research relating to mentally retarded children. Washington: Government Printer.
Chicago
United States. Department of Health Education and Welfare. Social Se curity Administration. Children's Bureau, . 1960. Research relating to mentally retarded children. Washington: Government Printer.
Harvard
United States. Department of Health Education and Welfare. Social Se curity Administration. Children's Bureau, . (1960). Research relating to mentally retarded children. Washington: Government Printer.
MLA
United States. Department of Health Education and Welfare. Social Se curity Administration. Children's Bureau, . Research relating to mentally retarded children. Washington: Government Printer. 1960.