MLA
Wright, Richard R. (Richard Robert), 1878-. The Negro in Pennsylvania : a study in economic history. 1912. African American Imprints Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/385n8pk319-cor.
APA, 6th edition
Wright, Richard R. (Richard Robert), 1878-. (1912)[The Negro in Pennsylvania : a study in economic history]. African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/385n8pk319-cor.
Chicago
Wright, Richard R. (Richard Robert), 1878-, The Negro in Pennsylvania : a study in economic history, 1912, African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/385n8pk319-cor.