MLA
The National Negro Business Directory. National Negro Business Directory System, 1918. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/071ngf1x7r-cor.
APA, 6th edition
The national Negro business directory. (1918). [African American pamphlet.]. National Negro Business Directory System; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/071ngf1x7r-cor.
Chicago
“The National Negro Business Directory.” African American pamphlet. African American Imprints Collection. Wilmington, Del.: National Negro Business Directory System, 1918. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/071ngf1x7r-cor.