Berks County, An Historical MapBerks County, Pennsylvania, An Historical Map

Chicago citation style
Albright, Raymond W, Dunkelberger, Ralph D. Berks County, An Historical Map,Berks County, Pennsylvania, An Historical Map. 1947. Retrieved from the Digital Public Library of America, https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~274144~90047920. (Accessed December 16, 2018.)
APA citation style
Albright, Raymond W, Dunkelberger, Ralph D, (1947) Berks County, An Historical Map,Berks County, Pennsylvania, An Historical Map. Retrieved from the Digital Public Library of America, https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~274144~90047920
MLA citation style
Albright, Raymond W, Dunkelberger, Ralph D. Retrieved from the Digital Public Library of America <https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~274144~90047920>.
Note: These citations are programmatically generated and may be incomplete.