[Letter : Francis Blackburne to Thomas Cadell]
MLA
Blackburne, Francis, 1705-1787. [Letter : Francis Blackburne to Thomas Cadell]. Box 1301-1400 | Folder 1321. 1767 October 23. https://collections.library.yale.edu/catalog/15235485.
APA, 6th edition
Blackburne, Francis, 1705-1787. (["Box 1301-1400 | Folder 1321"])(1767 October 23)[[Letter : Francis Blackburne to Thomas Cadell]]. https://collections.library.yale.edu/catalog/15235485.