Cite

Map of routes for a Pacific railroad : compiled to accompany the report of Hon. Jefferson Davis, Sec. of War / G.K. Warren.

MLA

Warren, Gouverneur Kemble, 1830-1882. Map of routes for a Pacific railroad : compiled to accompany the report of Hon. Jefferson Davis, Sec. of War / G.K. Warren.. BRBL_00538. 1855. https://collections.library.yale.edu/catalog/15813008.

APA, 6th edition

Warren, Gouverneur Kemble, 1830-1882. (["BRBL_00538"])(1855)[Map of routes for a Pacific railroad : compiled to accompany the report of Hon. Jefferson Davis, Sec. of War / G.K. Warren.]. https://collections.library.yale.edu/catalog/15813008.