Estados Unidos. Children's Bureau. (1923). Child labor in North Dakota. Government Printing Office.
Cita Chicago Style (17a ed.)Estados Unidos. Children's Bureau. Child Labor in North Dakota. Washington: Government Printing Office, 1923.
Cita MLA (9a ed.)Estados Unidos. Children's Bureau. Child Labor in North Dakota. Government Printing Office, 1923.
Precaución: Estas citas no son 100% exactas.