MLA

The Two Constant Lovers, or, A Patterne of True Love : Exprest in This Dialogue between Samuel and Sarah : to a Pleasant New Tune. Printed by and for A. M[ilbourn] and sold by the booksellers of London, 0AD. https://collections.library.yale.edu/catalog/11175016.

APA, 6th edition

The two constant lovers, or, A patterne of true love : exprest in this dialogue between Samuel and Sarah : to a pleasant new tune. (0 C.E.). Printed by and for A. M[ilbourn] and sold by the booksellers of London, https://collections.library.yale.edu/catalog/11175016.