APA

Costin L. B., . (1972). Child welfare: policies and practice. New York: McGraw-Hill.

Chicago

Costin Lela B, . 1972. Child welfare: policies and practice. New York: McGraw-Hill.

Harvard

Costin L. B., . (1972). Child welfare: policies and practice. New York: McGraw-Hill.

MLA

Costin Lela B, . Child welfare: policies and practice. New York: McGraw-Hill. 1972.