Washington (State). Department of Commerce and Economic Development. Business and Economic Research Division. Directory of Washington State manufacturers. Business and Economic Research Division, Dept. of Commerce and Economic Development.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Washington (State). Department of Commerce and Economic Development. Business and Economic Research Division. Directory of Washington State Manufacturers. Olympia: Business and Economic Research Division, Dept. of Commerce and Economic Development.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Washington (State). Department of Commerce and Economic Development. Business and Economic Research Division. Directory of Washington State Manufacturers. Business and Economic Research Division, Dept. of Commerce and Economic Development.