Cite

Williams' new trans-continental map of the Pacific R.R. and routes of overland travel to Colorado, Nebraska, the Black Hills, Utah, Idaho, Nevada, Montana, California, and the Pacific coast.

MLA

Williams, Henry T. Williams' New Trans-Continental Map of the Pacific R.R. and Routes of Overland Travel to Colorado, Nebraska, the Black Hills, Utah, Idaho, Nevada, Montana, California, and the Pacific Coast. H.T. Williams, 0AD. https://collections.library.yale.edu/catalog/15813022.

APA, 6th edition

Williams, H. T. (0 C.E.). Williams' new trans-continental map of the Pacific R.R. and routes of overland travel to Colorado, Nebraska, the Black Hills, Utah, Idaho, Nevada, Montana, California, and the Pacific coast. [Maps]. H.T. Williams, https://collections.library.yale.edu/catalog/15813022.