Campbell, E. H. (1956). Franchises in the State of Washington. Published by Bureau of Governmental Research and Services, University of Washington; distributed by University of Washington Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Campbell, Ernest H. Franchises in the State of Washington. Seattle: Published by Bureau of Governmental Research and Services, University of Washington; distributed by University of Washington Press, 1956.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Campbell, Ernest H. Franchises in the State of Washington. Published by Bureau of Governmental Research and Services, University of Washington; distributed by University of Washington Press, 1956.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.