Washington Water Power Company. (1940). Accomplishment of the Washington Water Power Company in competition for the Charles A. Coffin Award.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Washington Water Power Company. Accomplishment of the Washington Water Power Company in Competition for the Charles A. Coffin Award. [Spokane, Wash, 1940.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Washington Water Power Company. Accomplishment of the Washington Water Power Company in Competition for the Charles A. Coffin Award. 1940.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.