Answer
Works Cited
Beers, S.N., and D.J. Lake. Map of the Vicinity of Philadelphia. David Rumsey Historical Map Collection, 1860, searchworks.stanford.edu/view/10451036
Parenthetical citation: (Beers and Lake)
Narrative citation: Beers and Lake include inset business directories of Philadelphia, Germantown, Frankford, and Bridesburg in their map.
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