Cite

Official road map of Minnesota / [prepared for] Shell.

MLA

Company, H. M. Gousha. Official Road Map of Minnesota / [Prepared for] Shell. H.M. Gousha, 1940. https://collections.library.yale.edu/catalog/15814603.

APA, 6th edition

Company, H. M. G. (1940). Official road map of Minnesota / [prepared for] Shell. [Road maps]. H.M. Gousha, https://collections.library.yale.edu/catalog/15814603.