Washington Conservation Needs Committee. (1962). Washington soil and water conservation needs inventory. Washington Conservation Needs Committee.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Washington Conservation Needs Committee. Washington Soil and Water Conservation Needs Inventory. [Spokane, Wash.]: Washington Conservation Needs Committee, 1962.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Washington Conservation Needs Committee. Washington Soil and Water Conservation Needs Inventory. Washington Conservation Needs Committee, 1962.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.