Ferris, W. A., & Phillips, P. C. (1940). Life in the Rocky mountains: A diary of wanderings on the sources of the rivers Missouri, Columbia, and Colorado from February, 1830, to November, 1835. F. A. Rosenstock, The Old West publishing company.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ferris, Warren Angus, و Paul C. Phillips. Life in the Rocky Mountains: A Diary of Wanderings on the Sources of the Rivers Missouri, Columbia, and Colorado from February, 1830, to November, 1835. Denver, Col.: F. A. Rosenstock, The Old West publishing company, 1940.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ferris, Warren Angus, و Paul C. Phillips. Life in the Rocky Mountains: A Diary of Wanderings on the Sources of the Rivers Missouri, Columbia, and Colorado from February, 1830, to November, 1835. F. A. Rosenstock, The Old West publishing company, 1940.