Cita APA (7th ed.)
(1959). Self-Training unit on child-labor laws for youth placement workers. U.S. Government Printing Office.
Cita Chicago (17th ed.)
Self-Training Unit on Child-labor Laws for Youth Placement Workers. Washington: U.S. Government Printing Office, 1959.
Cita MLA (9th ed.)
Self-Training Unit on Child-labor Laws for Youth Placement Workers. U.S. Government Printing Office, 1959.
Atenció: Aquestes cites poden no estar 100% correctes.