Cite

Invasion Map - reprinted from the Chicago Sun/ Map by Tom P. Barrett.

MLA

Invasion Map - Reprinted from the Chicago Sun/ Map by Tom P. Barrett. Chicago Sun, 0AD. https://collections.library.yale.edu/catalog/15259141.

APA, 6th edition

Invasion Map - reprinted from the Chicago Sun/ Map by Tom P. Barrett. (0 C.E.). [Maps]. Chicago Sun, https://collections.library.yale.edu/catalog/15259141.