MLA
Crowther, Samuel, 1806?-1891, Schön, James Frederick, 1803-1889, Church Missionary Society, Page, Jesse. Samuel Ajayi Crowther and Western African Christianity in the Nineteenth Century. Pitts Theology Library. https://digital.library.emory.edu/purl/774qjq2d0f-cor.
APA, 6th edition
Crowther, Samuel, 1806?-1891, & Schön, James Frederick, 1803-1889, & Church Missionary Society, & Page, Jesse. [Samuel Ajayi Crowther and Western African Christianity in the Nineteenth Century]. Pitts Theology Library. https://digital.library.emory.edu/purl/774qjq2d0f-cor.
Chicago
Crowther, Samuel, 1806?-1891, Schön, James Frederick, 1803-1889, Church Missionary Society, Page, Jesse, Samuel Ajayi Crowther and Western African Christianity in the Nineteenth Century, Pitts Theology Library. https://digital.library.emory.edu/purl/774qjq2d0f-cor.