Oregon. Department of Geology and Mineral Industries. (1968). Oregon's gold placers. Issued by State of Oregon, Department of Geology and Mineral Industries.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Oregon. Department of Geology and Mineral Industries. Oregon's Gold Placers. [Salem, Or.]: Issued by State of Oregon, Department of Geology and Mineral Industries, 1968.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Oregon. Department of Geology and Mineral Industries. Oregon's Gold Placers. Issued by State of Oregon, Department of Geology and Mineral Industries, 1968.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.