Frankfurt am Main, Frankfurt-M. 1:15 000 : city 1:9 000 = Innenstadt 1:9 000 / Cartographia

Chicago citation style
Frankfurt am Main, Frankfurt-M. 1:15 000 : city 1:9 000 = Innenstadt 1:9 000 / Cartographia. 1999. Retrieved from the Digital Public Library of America, http://collections.lib.uwm.edu/cdm/ref/collection/agdm/id/9004. (Accessed March 30, 2020.)
APA citation style
(1999) Frankfurt am Main, Frankfurt-M. 1:15 000 : city 1:9 000 = Innenstadt 1:9 000 / Cartographia. Retrieved from the Digital Public Library of America, http://collections.lib.uwm.edu/cdm/ref/collection/agdm/id/9004
MLA citation style
Retrieved from the Digital Public Library of America <http://collections.lib.uwm.edu/cdm/ref/collection/agdm/id/9004>.
Note: These citations are programmatically generated and may be incomplete.