MLA
Heard, William H. (William Henry), 1850-1937. Three years work in West Africa : illustrated. 1911. African American Imprints Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/252j6q5889-cor.
APA, 6th edition
Heard, William H. (William Henry), 1850-1937. (1911)[Three years work in West Africa : illustrated]. African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/252j6q5889-cor.
Chicago
Heard, William H. (William Henry), 1850-1937, Three years work in West Africa : illustrated, 1911, African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/252j6q5889-cor.