MLA

Barralet, John James, 1747-1815, Humphrys, William, 1794-1865. A new universal atlas, containing maps of the various empires, kingdoms, states and republics of the world .... 1836. https://collections.library.yale.edu/catalog/2043732.

APA, 6th edition

Barralet, John James, 1747-1815, & Humphrys, William, 1794-1865. (1836)[A new universal atlas, containing maps of the various empires, kingdoms, states and republics of the world ...]. https://collections.library.yale.edu/catalog/2043732.