[Photographic postcard : The tree where Burton was hanged by mob, Springfield, Aug 08]
MLA
[Photographic Postcard : The Tree Where Burton Was Hanged by Mob, Springfield, Aug 08]. 0AD. https://collections.library.yale.edu/catalog/10868343.
APA, 6th edition
[Photographic postcard : The tree where Burton was hanged by mob, Springfield, Aug 08]. (0 C.E.). [Photographic postcards, Photomechanical prints]. https://collections.library.yale.edu/catalog/10868343.