Northern Pacific Railroad Company & Rand McNally and Company. (1879). Map of the Northern Pacific Railroad and connections. Northern Pacific Railroad.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Northern Pacific Railroad Company و Rand McNally and Company. Map of the Northern Pacific Railroad and Connections. [St. Paul, Minn.]: Northern Pacific Railroad, 1879.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Northern Pacific Railroad Company و Rand McNally and Company. Map of the Northern Pacific Railroad and Connections. Northern Pacific Railroad, 1879.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.