MLA
Bush, Issac Ashley Jr. 1900. Oxford College Library (Oxford, Ga.), OP 1900. https://digital.library.emory.edu/purl/491fj6q66w-cor.
APA, 6th edition
Bush, Issac Ashley Jr. (OP 1900). (1900). [Black-and-white photographs]. Oxford College Library (Oxford, Ga.). https://digital.library.emory.edu/purl/491fj6q66w-cor.
Chicago
“Bush, Issac Ashley Jr.” Black-and-white photographs. Early Emory College Photographs, 1900. OP 1900. Oxford College Library (Oxford, Ga.). https://digital.library.emory.edu/purl/491fj6q66w-cor.