MLA

Geological Survey (U.S.). Philadelphia and vicinity, Pennsylvania - New Jersey and Delaware.. BRBL_00501. 1902. https://collections.library.yale.edu/catalog/15827481.

APA, 6th edition

Geological Survey (U.S.). (["BRBL_00501"])(1902)[Philadelphia and vicinity, Pennsylvania - New Jersey and Delaware.]. https://collections.library.yale.edu/catalog/15827481.