MLA
Sherman, Ron. Cesar Chavez Speaking after Receiving the 2nd Martin Luther King Jr. Peace Prize. 1974. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 2, Folder 10. https://digital.library.emory.edu/purl/385n8pk176-cor.
APA, 6th edition
Sherman, R. (1974). Cesar Chavez speaking after receiving the 2nd Martin Luther King Jr. Peace Prize (Box 2, Folder 10) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/385n8pk176-cor.
Chicago
Sherman, Ron. “Cesar Chavez Speaking after Receiving the 2nd Martin Luther King Jr. Peace Prize.” Black-and-white photographs. Ron Sherman Photographs Collection, 1974. Box 2, Folder 10. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/385n8pk176-cor.