MLA

W. P., and E. Dudden. General Mourning. Balne, printer, Gracechurch Street, 0AD. https://collections.library.yale.edu/catalog/33111701.

APA, 6th edition

W. P., & Dudden, E. (0 C.E.). General mourning [Advertisements, Ephemera]. Balne, printer, Gracechurch Street. https://collections.library.yale.edu/catalog/33111701.