MLA

Portsmouth Theatre (Portsmouth, England). At the New Theatre in Portsmouth, this present Friday, being the 24th of July, will be presented the historical tragedy of King Richard the Third ... : to which will be added a farce, call'd, The honest Yorkshire-man ... tickets to be had at the Fountain ... and the Wheat Sheaf on the common. [1761]. https://collections.library.yale.edu/catalog/33208832.

APA, 6th edition

Portsmouth Theatre (Portsmouth, England). ([1761])[At the New Theatre in Portsmouth, this present Friday, being the 24th of July, will be presented the historical tragedy of King Richard the Third ... : to which will be added a farce, call'd, The honest Yorkshire-man ... tickets to be had at the Fountain ... and the Wheat Sheaf on the common]. https://collections.library.yale.edu/catalog/33208832.