MLA

Battle at Bull's Run, Sunday, July 21 The Rebel Troops Firing upon the Wounded Federal Soldiers ... [Graphic]. Frank Leslie's Publishing House, 0AD. https://collections.library.yale.edu/catalog/17339996.

APA, 6th edition

Battle at Bull's Run, Sunday, July 21 The rebel troops firing upon the wounded federal soldiers ... [graphic]. (0 C.E.). [Wood engravings]. Frank Leslie's Publishing House. https://collections.library.yale.edu/catalog/17339996.