MLA

Dalby Theatre. July 14th, 1803. Tancred & Sigismunda with Bon Ton. Admission Ticket (Not Transferable). publisher not identified, 0AD. https://collections.library.yale.edu/catalog/15956770.

APA, 6th edition

Dalby Theatre. July 14th, 1803. Tancred & Sigismunda with Bon Ton. Admission ticket (not transferable). (0 C.E.). [Admission tickets, Annotations (Provenance) 19th century]. publisher not identified. https://collections.library.yale.edu/catalog/15956770.