Northwest Irrigation and Development Congress Seattle, Wash. (1920). Proceedings of Northwest Irrigation and Development Congress: Held at Seattle, Washington, September 16-17, 1920.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Northwest Irrigation and Development Congress Seattle, Wash. Proceedings of Northwest Irrigation and Development Congress: Held at Seattle, Washington, September 16-17, 1920. [Seattle?, 1920.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Northwest Irrigation and Development Congress Seattle, Wash. Proceedings of Northwest Irrigation and Development Congress: Held at Seattle, Washington, September 16-17, 1920. 1920.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.