MLA

Theatre Royal (Bath, England). This present Thursday, April 28, 1808, will be presented the tragedy of Tancred & Sigismunda ... : to which will be added, a favourite melo-drame, called A tale of mystery .... [1808]. https://collections.library.yale.edu/catalog/33208428.

APA, 6th edition

Theatre Royal (Bath, England). ([1808])[This present Thursday, April 28, 1808, will be presented the tragedy of Tancred & Sigismunda ... : to which will be added, a favourite melo-drame, called A tale of mystery ...]. https://collections.library.yale.edu/catalog/33208428.