Pacific Northwest Forest and Range Experiment Station (Portland, Or.), Cowlin, R. W., & Moravets, F. L. (1940). Forest resources of Washington. Division of Forestry, Dept. of Conservation and Development, State of Washington.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Pacific Northwest Forest and Range Experiment Station (Portland, Or.), Robert W. Cowlin, و F. L. Moravets. Forest Resources of Washington. Olympia: Division of Forestry, Dept. of Conservation and Development, State of Washington, 1940.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Pacific Northwest Forest and Range Experiment Station (Portland, Or.), et al. Forest Resources of Washington. Division of Forestry, Dept. of Conservation and Development, State of Washington, 1940.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.