United States. Department of Labor Bureau of Labor Statistics. (1988). Supplement to employment and earnings. U.S. Department of Labor.
Chicago-Zitierstil (17. Ausg.)United States. Department of Labor Bureau of Labor Statistics. Supplement to Employment and Earnings. U.S: U.S. Department of Labor, 1988.
MLA-Zitierstil (9. Ausg.)United States. Department of Labor Bureau of Labor Statistics. Supplement to Employment and Earnings. U.S. Department of Labor, 1988.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.