U.S. Bureau of Labor Statistics. (1941). Retail prices of food. U.S. Govt. Print. Off.
Chicago-viite (17. p.)U.S. Bureau of Labor Statistics. Retail Prices of Food. Washington, D.C: U.S. Govt. Print. Off, 1941.
MLA-viite (9. p.)U.S. Bureau of Labor Statistics. Retail Prices of Food. U.S. Govt. Print. Off, 1941.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.