Goble, D., & Hirt, P. W. (1999). Northwest lands, northwest peoples: Readings in environmental history. University of Washington Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Goble, Dale, و Paul W. Hirt. Northwest Lands, Northwest Peoples: Readings in Environmental History. Seattle, Wash.,: University of Washington Press, 1999.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Goble, Dale, و Paul W. Hirt. Northwest Lands, Northwest Peoples: Readings in Environmental History. University of Washington Press, 1999.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.