APA引文

U.S. Bureau of Labor Statistics. (1941). Retail prices of food. U.S. Govt. Print. Off.

芝加哥风格引文

U.S. Bureau of Labor Statistics. Retail Prices of Food. Washington, D.C: U.S. Govt. Print. Off, 1941.

MLA引文

U.S. Bureau of Labor Statistics. Retail Prices of Food. U.S. Govt. Print. Off, 1941.

警告：这些引文格式不一定是100％准确.