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MLA

United States Food Safety and Inspection Service. Hamburger : questions and answers. U.S. Dept. of Agriculture, Food Safety and Quality Service, 1981.

APA

United States Food Safety and Inspection Service. (1981). Hamburger : questions and answers. U.S. Dept. of Agriculture, Food Safety and Quality Service.

Chicago

United States Food Safety and Inspection Service. Hamburger : questions and answers. U.S. Dept. of Agriculture, Food Safety and Quality Service, 1981.