MLA
Ovington, Mary White, 1865-1951. How the National Association for the Advancement of Colored People began. 1914. African American Imprints Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/948sbcc3ft-cor.
APA, 6th edition
Ovington, Mary White, 1865-1951. (1914)[How the National Association for the Advancement of Colored People began]. African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/948sbcc3ft-cor.
Chicago
Ovington, Mary White, 1865-1951, How the National Association for the Advancement of Colored People began, 1914, African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/948sbcc3ft-cor.