MLA
Thomas, I. L. (Isaac Lemuel), 1860-. Separation or continuity, which?, or, A colored man's reply to Bishop Foster's book, "Union of Episcopal Methodisms". 1893. African American Imprints Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0515mkkzh2-cor.
APA, 6th edition
Thomas, I. L. (Isaac Lemuel), 1860-. (1893)[Separation or continuity, which?, or, A colored man's reply to Bishop Foster's book, "Union of Episcopal Methodisms"]. African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0515mkkzh2-cor.
Chicago
Thomas, I. L. (Isaac Lemuel), 1860-, Separation or continuity, which?, or, A colored man's reply to Bishop Foster's book, "Union of Episcopal Methodisms", 1893, African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0515mkkzh2-cor.