Cite

(MONTANA & IDAHO) [Anon.] [Untitled map of far northwestern Montana and a part of the Idaho panhandle.]

MLA

(MONTANA & IDAHO) [Anon.] [Untitled Map of Far Northwestern Montana and a Part of the Idaho Panhandle.]. 0AD. https://collections.library.yale.edu/catalog/2016959.

APA, 6th edition

(MONTANA & IDAHO) [Anon.] [Untitled map of far northwestern Montana and a part of the Idaho panhandle.]. (0 C.E.). [Maps]. https://collections.library.yale.edu/catalog/2016959.