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.
Cita Chicago Style (17a ed.)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.
Cita MLA (8a ed.)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.