Cite

Unknown photographer Group portrait of Company E, 4th U.S. Colored Infantry. Soldiers with muskets standing at ease. Barracks behind them. 19th century photograph, mounted, 9 x 11

MLA

Simpson, Randolph Linsly, 1927-1992. Unknown photographer Group portrait of Company E, 4th U.S. Colored Infantry. Soldiers with muskets standing at ease. Barracks behind them. 19th century photograph, mounted, 9 x 11. Box 18, folder 830. undated. https://collections.library.yale.edu/catalog/2005523.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 18, folder 830"])(undated)[Unknown photographer Group portrait of Company E, 4th U.S. Colored Infantry. Soldiers with muskets standing at ease. Barracks behind them. 19th century photograph, mounted, 9 x 11]. https://collections.library.yale.edu/catalog/2005523.