MLA

At the New Theatre in Winchester; This Present Monday Evening, Being the 4th of August, Will Be Presented a Tragedy, Call'd, Romeo and Juliet ... New Theatre in Winchester, 0AD. https://collections.library.yale.edu/catalog/33230519.

APA, 6th edition

At the new theatre in Winchester; this present Monday evening, being the 4th of August, will be presented a tragedy, call'd, Romeo and Juliet ... (0 C.E.). [Playbills, Broadsides, Annotations (Provenance) 18th century, Brit tracts]. New Theatre in Winchester. https://collections.library.yale.edu/catalog/33230519.