MLA

Adam and Charles Black (Firm), Aikman, George, engraver, Barlow, Peter, 1776-1862. A chart of magnetic curves of equal variation / by Peter Barlow.. BRBL_00009. 1854]. https://collections.library.yale.edu/catalog/15234625.

APA, 6th edition

Adam and Charles Black (Firm), & Aikman, George, engraver, & Barlow, Peter, 1776-1862. (["BRBL_00009"])(1854])[A chart of magnetic curves of equal variation / by Peter Barlow.]. https://collections.library.yale.edu/catalog/15234625.