MLA
Kealing, H. T. (Hightower Theodore), 1860-1918. How to live longer : the gospel of good health : a simple treatise designed to correct the large death rate among the people both in city and country. XXXX. African American Imprints Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/320sqv9t5k-cor.
APA, 6th edition
Kealing, H. T. (Hightower Theodore), 1860-1918. (XXXX)[How to live longer : the gospel of good health : a simple treatise designed to correct the large death rate among the people both in city and country]. African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/320sqv9t5k-cor.
Chicago
Kealing, H. T. (Hightower Theodore), 1860-1918, How to live longer : the gospel of good health : a simple treatise designed to correct the large death rate among the people both in city and country, XXXX, African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/320sqv9t5k-cor.