Cite

Aeroplane map of Glacier National Park, Montana, with Logan Pass Detour.

MLA

Great Northern Railway Company (U.S.). Aeroplane map of Glacier National Park, Montana, with Logan Pass Detour.. BRBL_00581. 1935?]. https://collections.library.yale.edu/catalog/15818307.

APA, 6th edition

Great Northern Railway Company (U.S.). (["BRBL_00581"])(1935?])[Aeroplane map of Glacier National Park, Montana, with Logan Pass Detour.]. https://collections.library.yale.edu/catalog/15818307.