MLA

Theatre Royal (York, England). On Saturday evening, March 7, 1801, their Majesties servants will perform the favourite comedy of Such things are ... : to which will be added, a musical farce, called St. David's Day; or, The humours of Wales .... [1801]. https://collections.library.yale.edu/catalog/33208093.

APA, 6th edition

Theatre Royal (York, England). ([1801])[On Saturday evening, March 7, 1801, their Majesties servants will perform the favourite comedy of Such things are ... : to which will be added, a musical farce, called St. David's Day; or, The humours of Wales ...]. https://collections.library.yale.edu/catalog/33208093.