MLA
Wright, Richard R. (Richard Robert), 1878-. The Negro problem : being extracts from two lectures on "The sociological point of view in the study of race problems," and "The Negro problem, what it is not, and what it is". XXXX. African American Imprints Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/996k0p2pp5-cor.
APA, 6th edition
Wright, Richard R. (Richard Robert), 1878-. (XXXX)[The Negro problem : being extracts from two lectures on "The sociological point of view in the study of race problems," and "The Negro problem, what it is not, and what it is"]. African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/996k0p2pp5-cor.
Chicago
Wright, Richard R. (Richard Robert), 1878-, The Negro problem : being extracts from two lectures on "The sociological point of view in the study of race problems," and "The Negro problem, what it is not, and what it is", XXXX, African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/996k0p2pp5-cor.