MLA
Singleton, James. The Sixth Race : Infant Baby Race. [publisher not identified], 0AD. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/948sbcc3ks-cor.
APA, 6th edition
Singleton, J. (0 C.E.). The sixth race : infant baby race [African American author., African American pamphlet.]. [publisher not identified]; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/948sbcc3ks-cor.
Chicago
Singleton, James. “The Sixth Race : Infant Baby Race.” African American author., African American pamphlet. African American Imprints Collection. [United States]: [publisher not identified], 0AD. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/948sbcc3ks-cor.