MLA

Wheeler, George M. (George Montague), 1842-1905. U.S. geographical surveys west of the 100th meridian [cartographic material] : parts of eastern Arizona and western New Mexico, atlas sheet no. 76 / under the command of 1st. Lieut. Geo. M. Wheeler.. BRBL_00598. 1876. https://collections.library.yale.edu/catalog/15824431.

APA, 6th edition

Wheeler, George M. (George Montague), 1842-1905. (["BRBL_00598"])(1876)[U.S. geographical surveys west of the 100th meridian [cartographic material] : parts of eastern Arizona and western New Mexico, atlas sheet no. 76 / under the command of 1st. Lieut. Geo. M. Wheeler.]. https://collections.library.yale.edu/catalog/15824431.