MLA
Andrew, James O. (James Osgood), 1794-1871. Envelope addressed to Robert Paine (Aberdeen, Mississippi). unknown. Robert Paine Papers, 1828-1882. Pitts Theology Library. https://digital.library.emory.edu/purl/784zgmsck4-cor.
APA, 6th edition
Andrew, James O. (James Osgood), 1794-1871. (unknown)[Envelope addressed to Robert Paine (Aberdeen, Mississippi)]. Robert Paine Papers, 1828-1882, Pitts Theology Library. https://digital.library.emory.edu/purl/784zgmsck4-cor.
Chicago
Andrew, James O. (James Osgood), 1794-1871, Envelope addressed to Robert Paine (Aberdeen, Mississippi), unknown, Robert Paine Papers, 1828-1882, Pitts Theology Library. https://digital.library.emory.edu/purl/784zgmsck4-cor.