Street map of Vancouver / [prepared for] Shell.
MLA
Company, H. M. Gousha. Street Map of Vancouver / [Prepared for] Shell. H.M. Gousha Co., 0AD. https://collections.library.yale.edu/catalog/15536326.
APA, 6th edition
Company, H. M. G. (0 C.E.). Street map of Vancouver / [prepared for] Shell. [Maps]. H.M. Gousha Co., https://collections.library.yale.edu/catalog/15536326.