MLA

Theatre Royal (Bath, England). This present Saturday, Nov. 18th, 1815, will be produced a new comedy (never acted here) called Living in London ... : to which will be added the grand melo-dramatic romance of Valentine & Orson .... [1815]. https://collections.library.yale.edu/catalog/33208371.

APA, 6th edition

Theatre Royal (Bath, England). ([1815])[This present Saturday, Nov. 18th, 1815, will be produced a new comedy (never acted here) called Living in London ... : to which will be added the grand melo-dramatic romance of Valentine & Orson ...]. https://collections.library.yale.edu/catalog/33208371.