Cite

Map of Greater St. Louis and suburbs / H.W. Gross.

MLA

Gross, Herman W. Map of Greater St. Louis and Suburbs / H.W. Gross. H.W. Gross, 0AD. https://collections.library.yale.edu/catalog/15814686.

APA, 6th edition

Gross, H. W. (0 C.E.). Map of Greater St. Louis and suburbs / H.W. Gross. [Road maps]. H.W. Gross, https://collections.library.yale.edu/catalog/15814686.