MLA

Theatre Royal (York, England). On Thursday evening, May 7, 1801, their Majesties servants will perform a comedy, called The busy body ... : to which will be added, a farce, in two acts, called Who's the dupe? written by Mrs. Cowley .... [1801]. https://collections.library.yale.edu/catalog/33208349.

APA, 6th edition

Theatre Royal (York, England). ([1801])[On Thursday evening, May 7, 1801, their Majesties servants will perform a comedy, called The busy body ... : to which will be added, a farce, in two acts, called Who's the dupe? written by Mrs. Cowley ...]. https://collections.library.yale.edu/catalog/33208349.