Washington State University. College of Engineering. Research Division & Washington State University. Bureau of Economic and Business Research. (1952). Directory of manufacturers, the state of Washington. State College of Washington.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Washington State University. College of Engineering. Research Division và Washington State University. Bureau of Economic and Business Research. Directory of Manufacturers, the State of Washington. Pullman, Wash.: State College of Washington, 1952.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Washington State University. College of Engineering. Research Division và Washington State University. Bureau of Economic and Business Research. Directory of Manufacturers, the State of Washington. State College of Washington, 1952.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.