MLA

Berkeley, George, 1685-1753. George Berkeley letter, Newport, Rhode Island, to Martin Benson, London, 1729 April 11 : manuscript. (File). 1729 April 11.. https://collections.library.yale.edu/catalog/2025170.

APA, 6th edition

Berkeley, George, 1685-1753. (["(File)"])(1729 April 11.)[George Berkeley letter, Newport, Rhode Island, to Martin Benson, London, 1729 April 11 : manuscript]. https://collections.library.yale.edu/catalog/2025170.