Cita APA (7th ed.)
United States Department of Labor. Division of Labor Standards. (1942). National standards for carpentry apprenticeship.
Cita Chicago (17th ed.)
United States Department of Labor. Division of Labor Standards. National Standards for Carpentry Apprenticeship. Washington, 1942.
Cita MLA (9th ed.)
United States Department of Labor. Division of Labor Standards. National Standards for Carpentry Apprenticeship. 1942.
Atenció: Aquestes cites poden no estar 100% correctes.