MLA

Morgan, Nicholas G. (Nicholas Groesbeck), 1884-1971. Map of Great Salt Lake City and part of Salt Lake County, Utah : showing the route taken by the first group of emigrant pioneer wagons ... / map compiled for and copyrighted by Nicholas G. Morgan, Sr. ; J.B. Ireland, draftsman.. BRBL_00592. 195-?]. https://collections.library.yale.edu/catalog/15818488.

APA, 6th edition

Morgan, Nicholas G. (Nicholas Groesbeck), 1884-1971. (["BRBL_00592"])(195-?])[Map of Great Salt Lake City and part of Salt Lake County, Utah : showing the route taken by the first group of emigrant pioneer wagons ... / map compiled for and copyrighted by Nicholas G. Morgan, Sr. ; J.B. Ireland, draftsman.]. https://collections.library.yale.edu/catalog/15818488.