MLA

Morris, C. A. F. Minnesota Route, the Shortest and Best to the Idaho Gold Mines / Compiled by C.A.F. Morris. D.D. Merrill, 0AD. https://collections.library.yale.edu/catalog/15812952.

APA, 6th edition

Morris, C. A. F. (0 C.E.). Minnesota route, the shortest and best to the Idaho gold mines / compiled by C.A.F. Morris. [Maps]. D.D. Merrill, https://collections.library.yale.edu/catalog/15812952.