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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Washington State University. College of Engineering. Research Division و Washington State University. Bureau of Economic and Business Research. Directory of Manufacturers, the State of Washington. Pullman, Wash.: State College of Washington, 1952.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Washington State University. College of Engineering. Research Division و Washington State University. Bureau of Economic and Business Research. Directory of Manufacturers, the State of Washington. State College of Washington, 1952.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.