Brumfield, K. (1968). This was wheat farming: A pictorial history of the farms and farmers of the Northwest who grow the Nation's bread ([1st ed.].). Superior Pub. Co.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Brumfield, Kirby. This Was Wheat Farming: A Pictorial History of the Farms and Farmers of the Northwest Who Grow the Nation's Bread. [1st ed.]. Seattle: Superior Pub. Co, 1968.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Brumfield, Kirby. This Was Wheat Farming: A Pictorial History of the Farms and Farmers of the Northwest Who Grow the Nation's Bread. [1st ed.]. Superior Pub. Co, 1968.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.