MLA
Williams, Elmira. Directory and Valuable Information of the Negro Business and Professional Men and Women of Boston and Vicinity. [The Author?], 1914. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/197xksn0zb-cor.
APA, 6th edition
Williams, E. (1914). Directory and valuable information of the Negro business and professional men and women of Boston and vicinity. [African American publisher., African American pamphlet., African American author.]. [The Author?]; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/197xksn0zb-cor.
Chicago
Williams, Elmira. “Directory and Valuable Information of the Negro Business and Professional Men and Women of Boston and Vicinity.” African American publisher., African American pamphlet., African American author. African American Imprints Collection. [Boston, Mass.]: [The Author?], 1914. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/197xksn0zb-cor.