MLA

The Empress of Morocco. A Tragedy. With Sculptures. As It Is Acted at the Duke’s Theatre. Written by Elkanah Settle, Servant to His Majesty ... 1673. https://collections.library.yale.edu/catalog/2110132.

APA, 6th edition

The Empress of Morocco. A tragedy. With sculptures. As it is acted at the Duke’s theatre. Written by Elkanah Settle, servant to his Majesty ... (1673). [Engravings, Illustrations, Intaglio prints, Prints (Visual works)]. https://collections.library.yale.edu/catalog/2110132.