MLA

Theatre Royal (York, England). On Saturday evening, February 21, 1801, their Majesties' servants will perform a favourite comedy, in three acts, called The birth-day ... : after which, a favourite farce, in two acts, called The Irish widow .... [1801]. https://collections.library.yale.edu/catalog/33208115.

APA, 6th edition

Theatre Royal (York, England). ([1801])[On Saturday evening, February 21, 1801, their Majesties' servants will perform a favourite comedy, in three acts, called The birth-day ... : after which, a favourite farce, in two acts, called The Irish widow ...]. https://collections.library.yale.edu/catalog/33208115.