Henricksen, D. L. (1970). The State of Washington tourist resources and investment potential. Dept. of Commerce and Economic Development. Business and Economic Research Division.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Henricksen, Dean L. The State of Washington Tourist Resources and Investment Potential. Olympia: Dept. of Commerce and Economic Development. Business and Economic Research Division, 1970.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Henricksen, Dean L. The State of Washington Tourist Resources and Investment Potential. Dept. of Commerce and Economic Development. Business and Economic Research Division, 1970.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.