Disturnell's new map of the United States and Canada : showing all the canals, rail roads, telegraph lines and principal stage routes / drawn by Henry A. Burr, topographer to the Post Office Dep't., Washington, D.C. ; engraved by J.M. Atwood, N.Y.
MLA
Burr, Henry A. Disturnell's New Map of the United States and Canada : Showing All the Canals, Rail Roads, Telegraph Lines and Principal Stage Routes / Drawn by Henry A. Burr, Topographer to the Post Office Dep't., Washington, D.C. ; Engraved by J.M. Atwood, N.Y. Published by J. Disturnell, 1850. https://collections.library.yale.edu/catalog/15536475.
APA, 6th edition
Burr, H. A. (1850). Disturnell's new map of the United States and Canada : showing all the canals, rail roads, telegraph lines and principal stage routes / drawn by Henry A. Burr, topographer to the Post Office Dep't., Washington, D.C. ; engraved by J.M. Atwood, N.Y. [Maps]. Published by J. Disturnell, https://collections.library.yale.edu/catalog/15536475.