McFarland, C. R. (1983). Oil and gas exploration in Washington, 1900-1982. State of Washington, Dept. of Natural Resources, Division of Geology and Earth Resources.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)McFarland, Carl R. Oil and Gas Exploration in Washington, 1900-1982. Olympia, Wash.: State of Washington, Dept. of Natural Resources, Division of Geology and Earth Resources, 1983.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)McFarland, Carl R. Oil and Gas Exploration in Washington, 1900-1982. State of Washington, Dept. of Natural Resources, Division of Geology and Earth Resources, 1983.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.