MLA

Theatre Royal (York, England). On Thursday evening August 25th, 1803, their Majesties' Servants will perform a favourite comedy, called The poor gentleman ... : after which a favourite farce, in two acts, called The agreeable surprise .... [1803]. https://collections.library.yale.edu/catalog/33208206.

APA, 6th edition

Theatre Royal (York, England). ([1803])[On Thursday evening August 25th, 1803, their Majesties' Servants will perform a favourite comedy, called The poor gentleman ... : after which a favourite farce, in two acts, called The agreeable surprise ...]. https://collections.library.yale.edu/catalog/33208206.