Kaw Valley Films & Marshall Publishing and Promotions. (2009). The history of the Oregon Trail and the Pony Express. Marshall Pub. and Promotions.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Kaw Valley Films و Marshall Publishing and Promotions. The History of the Oregon Trail and the Pony Express. [United States]: Marshall Pub. and Promotions, 2009.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Kaw Valley Films و Marshall Publishing and Promotions. The History of the Oregon Trail and the Pony Express. Marshall Pub. and Promotions, 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.