MLA
Pennsylvania Negro Business Directory, 1910 : Industrial and Material Growth of the Negroes of Pennsylvania. Jas. H. W. Howard & Son, 1910. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/5462547gg8-cor.
APA, 6th edition
Pennsylvania Negro business directory, 1910 : industrial and material growth of the Negroes of Pennsylvania. (1910). [African American author., African American publisher.]. Jas. H. W. Howard & Son; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/5462547gg8-cor.
Chicago
“Pennsylvania Negro Business Directory, 1910 : Industrial and Material Growth of the Negroes of Pennsylvania.” African American author., African American publisher. African American Imprints Collection. Harrisburg, Pa.: Jas. H. W. Howard & Son, 1910. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/5462547gg8-cor.