MLA

Imray, James F. (James Frederick), 1829?-1891, cartographer, James Imray and Son, issuing body. Western Pacific. Chart No. 2 / compiled by James F. Imray F.R.G.S.. BRBL_00021. https://collections.library.yale.edu/catalog/15237561.

APA, 6th edition

Imray, James F. (James Frederick), 1829?-1891, cartographer, & James Imray and Son, issuing body. (["BRBL_00021"])[Western Pacific. Chart No. 2 / compiled by James F. Imray F.R.G.S.]. https://collections.library.yale.edu/catalog/15237561.