(MONTANA & IDAHO) [Anon.] [Untitled map of far northwestern Montana and a part of the Idaho panhandle.] Scale 1/2=1 mile. Ink on oil cloth, 26 x 36-1/2". (Map 24)
MLA
Company, Northern Pacific Railway. (MONTANA & IDAHO) [Anon.] [Untitled Map of Far Northwestern Montana and a Part of the Idaho Panhandle.] Scale 1/2=1 Mile. Ink on Oil Cloth, 26 x 36-1/2". (Map 24). 0AD. https://collections.library.yale.edu/catalog/2016959.
APA, 6th edition
Company, N. P. R. (0 C.E.). (MONTANA & IDAHO) [Anon.] [Untitled map of far northwestern Montana and a part of the Idaho panhandle.] Scale 1/2=1 mile. Ink on oil cloth, 26 x 36-1/2". (Map 24). https://collections.library.yale.edu/catalog/2016959.