MLA

The Northamptonshire Tragedy. s.n., 0AD. https://collections.library.yale.edu/catalog/17124816.

APA, 6th edition

The Northamptonshire tragedy. (0 C.E.). [Poetry, Early works to 1800, Single sheet verse, Broadside poems]. s.n. https://collections.library.yale.edu/catalog/17124816.