APA

Zietz D., . (1959). Child welfare: principles and methods. New York: Wiley.

Chicago

Zietz Dorothy, . 1959. Child welfare: principles and methods. New York: Wiley.

Harvard

Zietz D., . (1959). Child welfare: principles and methods. New York: Wiley.

MLA

Zietz Dorothy, . Child welfare: principles and methods. New York: Wiley. 1959.