MLA
Nicholson, Alfred William, 1861-. Brief sketch of the life and labors of Rev. Alexander Bettis : also an account of the founding and development of the Bettis Academy. 1913. African American Imprints Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/549g4f4smp-cor.
APA, 6th edition
Nicholson, Alfred William, 1861-. (1913)[Brief sketch of the life and labors of Rev. Alexander Bettis : also an account of the founding and development of the Bettis Academy]. African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/549g4f4smp-cor.
Chicago
Nicholson, Alfred William, 1861-, Brief sketch of the life and labors of Rev. Alexander Bettis : also an account of the founding and development of the Bettis Academy, 1913, African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/549g4f4smp-cor.