Cite

Map of Crazy Mountains and vicinity, Montana Ter. / Northern Transcontinental Survey, Raphael Pumpelly, director ; Department of Topography, A.D. Wilson, chief topographer ; drawn by F.D. Owen.

MLA

Owen, F. D. Map of Crazy Mountains and Vicinity, Montana Ter. / Northern Transcontinental Survey, Raphael Pumpelly, Director ; Department of Topography, A.D. Wilson, Chief Topographer ; Drawn by F.D. Owen. Northern Transcontinental Survey?], 1882. https://collections.library.yale.edu/catalog/15814922.

APA, 6th edition

Owen, F. D. (1882). Map of Crazy Mountains and vicinity, Montana Ter. / Northern Transcontinental Survey, Raphael Pumpelly, director ; Department of Topography, A.D. Wilson, chief topographer ; drawn by F.D. Owen. [Maps]. Northern Transcontinental Survey?], https://collections.library.yale.edu/catalog/15814922.