MLA

Price, Jacob, fl. 1850. A map of the state of Delaware / [cartographic material] / from original surveys of Jacob Price & Samuel M. Rea, assisted by H. Paxon.. BRBL_00502. 1850. https://collections.library.yale.edu/catalog/15811170.

APA, 6th edition

Price, Jacob, fl. 1850. (["BRBL_00502"])(1850)[A map of the state of Delaware / [cartographic material] / from original surveys of Jacob Price & Samuel M. Rea, assisted by H. Paxon.]. https://collections.library.yale.edu/catalog/15811170.