MLA
Schön, James Frederick, 1803-1889, author. Journals of the Rev. James Frederick Schön and Mr. Samuel Crowther : who, with the sanction of Her Majesty's government, accompanied the expedition up the Niger, in 1841, in behalf of the Church Missionary Society.. 1842. Samuel Ajayi Crowther and Western African Christianity in the Nineteenth Century. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/53976hdssd-cor.
APA, 6th edition
Schön, James Frederick, 1803-1889, author. (1842)[Journals of the Rev. James Frederick Schön and Mr. Samuel Crowther : who, with the sanction of Her Majesty's government, accompanied the expedition up the Niger, in 1841, in behalf of the Church Missionary Society.]. Samuel Ajayi Crowther and Western African Christianity in the Nineteenth Century, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/53976hdssd-cor.
Chicago
Schön, James Frederick, 1803-1889, author, Journals of the Rev. James Frederick Schön and Mr. Samuel Crowther : who, with the sanction of Her Majesty's government, accompanied the expedition up the Niger, in 1841, in behalf of the Church Missionary Society., 1842, Samuel Ajayi Crowther and Western African Christianity in the Nineteenth Century, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/53976hdssd-cor.