"A half million sightseers have visited Independence Hall"

Chicago citation style
Ledger. "A half million sightseers have visited Independence Hall". 1939-07-26. Retrieved from the Digital Public Library of America, http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/25136. (Accessed September 24, 2018.)
APA citation style
Ledger, (1939-07-26) "A half million sightseers have visited Independence Hall". Retrieved from the Digital Public Library of America, http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/25136
MLA citation style
Ledger. Retrieved from the Digital Public Library of America <http://digital.library.temple.edu/cdm/ref/collection/p15037coll3/id/25136>.
Note: These citations are programmatically generated and may be incomplete.