MLA

Carlingford, Theobald Taaffe, Earl of, -1677. Joseph Emmanuel, King of Portugal, 1733- 1765. Letter, copy, to the Emperor of Germany, Ajuda concerning Nicholas, 6th Viscount Taaffe. Box 4, folder 104. 1764 Aug 19. https://collections.library.yale.edu/catalog/16676070.

APA, 6th edition

Carlingford, Theobald Taaffe, Earl of, -1677. (["Box 4, folder 104"])(1764 Aug 19)[Joseph Emmanuel, King of Portugal, 1733- 1765. Letter, copy, to the Emperor of Germany, Ajuda concerning Nicholas, 6th Viscount Taaffe]. https://collections.library.yale.edu/catalog/16676070.