MLA
Crummell, Alexander, 1819-1898. The English language in Liberia : the annual address before the citizens of Maryland County, Cape Palmas, Liberia--July 26, 1860 : being the day of national independence. 1861. African American Imprints Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/013mw6mb5b-cor.
APA, 6th edition
Crummell, Alexander, 1819-1898. (1861)[The English language in Liberia : the annual address before the citizens of Maryland County, Cape Palmas, Liberia--July 26, 1860 : being the day of national independence]. African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/013mw6mb5b-cor.
Chicago
Crummell, Alexander, 1819-1898, The English language in Liberia : the annual address before the citizens of Maryland County, Cape Palmas, Liberia--July 26, 1860 : being the day of national independence, 1861, African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/013mw6mb5b-cor.