Cita APA (7th ed.)
(1954). Employment and earnings. United States Department of Labor.
Cita Chicago (17th ed.)
Employment and Earnings. Washington: United States Department of Labor, 1954.
Cita MLA (9th ed.)
Employment and Earnings. United States Department of Labor, 1954.
Atenció: Aquestes cites poden no estar 100% correctes.