MLA
Beckett, Lemuel Morgan, 1854-. Rational thoughts concerning the Supreme Being of the Universe, and the true primitive religion. 1919. African American Imprints Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/914nk98vtq-cor.
APA, 6th edition
Beckett, Lemuel Morgan, 1854-. (1919)[Rational thoughts concerning the Supreme Being of the Universe, and the true primitive religion]. African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/914nk98vtq-cor.
Chicago
Beckett, Lemuel Morgan, 1854-, Rational thoughts concerning the Supreme Being of the Universe, and the true primitive religion, 1919, African American Imprints Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/914nk98vtq-cor.