Map of the Overland Route
MLA
Evans, R. M. Map of the Overland Route. R.M. Evans, 186AD. https://collections.library.yale.edu/catalog/2001523.
APA, 6th edition
Evans, R. M. (186 C.E.). Map of the Overland Route [Maps]. R.M. Evans. https://collections.library.yale.edu/catalog/2001523.