United States. Army. Corps of Engineers. (1882). Portion of the Map of Military Department of the Columbia showing location of River Survey Sheets. (1882).
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United States. Army. Corps of Engineers. Portion of the Map of Military Department of the Columbia Showing Location of River Survey Sheets. (1882). Washington, D.C., Govt. Print. Off, 1882.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)United States. Army. Corps of Engineers. Portion of the Map of Military Department of the Columbia Showing Location of River Survey Sheets. (1882). 1882.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.