MLA

Company, H. M. Gousha. Street Map of Vancouver. H.M. Gousha Co., 0AD. https://collections.library.yale.edu/catalog/15536327.

APA, 6th edition

Company, H. M. G. (0 C.E.). Street map of Vancouver. [Maps]. H.M. Gousha Co., https://collections.library.yale.edu/catalog/15536327.