MLA

Newcastle, William Cavendish, Duke of, 1592-1676, author. The triumphant widow, or The medley of humours : a comedy, acted by His Royal Highnes's servants. 1677.. https://collections.library.yale.edu/catalog/17198392.

APA, 6th edition

Newcastle, William Cavendish, Duke of, 1592-1676, author. (1677.)[The triumphant widow, or The medley of humours : a comedy, acted by His Royal Highnes's servants]. https://collections.library.yale.edu/catalog/17198392.