Conkling, R. P., & Conkling, M. B. (1947). The Butterfield Overland Mail, 1857-1869: Its organization and operation over the southern route to 1861; subsequently over the central route to 1866; and under Wells, Fargo and Company in 1869. A.H. Clark Co..
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Conkling, Roscoe P., và Margaret B. Conkling. The Butterfield Overland Mail, 1857-1869: Its Organization and Operation over the Southern Route to 1861; Subsequently over the Central Route to 1866; and Under Wells, Fargo and Company in 1869. Glendale, Calif.: A.H. Clark Co., 1947.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Conkling, Roscoe P., và Margaret B. Conkling. The Butterfield Overland Mail, 1857-1869: Its Organization and Operation over the Southern Route to 1861; Subsequently over the Central Route to 1866; and Under Wells, Fargo and Company in 1869. A.H. Clark Co., 1947.