APA (7e ed.) Bronvermelding

Child Welfare League of America. (1957). Recommedations on personnel practices in day nurseries. s.n.

Chicago (17e ed.) Bronvermelding

Child Welfare League of America. Recommedations on Personnel Practices in Day Nurseries. New York: s.n, 1957.

MLA (9e ed.) Bronvermelding

Child Welfare League of America. Recommedations on Personnel Practices in Day Nurseries. s.n, 1957.