MLA

Edward VI, King of England, 1537-1553, author. Copies of seven original letters from King Edward VI to Barnaby Fitz-Patrick. printed in the year M.DCC.LXXII. [1772]. https://collections.library.yale.edu/catalog/17088908.

APA, 6th edition

Edward VI, King of England, 1537-1553, author. (printed in the year M.DCC.LXXII. [1772])[Copies of seven original letters from King Edward VI to Barnaby Fitz-Patrick]. https://collections.library.yale.edu/catalog/17088908.