Washington (State). Division of Geology and Earth Resources. (1974). Energy resources of Washington. Division of Geology and Earth Resources; for sale by the Dept. of Natural Resources.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Washington (State). Division of Geology and Earth Resources. Energy Resources of Washington. Olympia, Wash.: Division of Geology and Earth Resources; for sale by the Dept. of Natural Resources, 1974.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Washington (State). Division of Geology and Earth Resources. Energy Resources of Washington. Division of Geology and Earth Resources; for sale by the Dept. of Natural Resources, 1974.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.