MLA
Worrell, A. S. (Adolphus Spalding), 1831-1908. The principles of English grammar. 1861. Civil War Imprints. Emory University. General Libraries. https://digital.library.emory.edu/purl/3009w0vxxg-cor.
APA, 6th edition
Worrell, A. S. (Adolphus Spalding), 1831-1908. (1861)[The principles of English grammar, ]. Civil War Imprints, Emory University. General Libraries. https://digital.library.emory.edu/purl/3009w0vxxg-cor.
Chicago
Worrell, A. S. (Adolphus Spalding), 1831-1908, The principles of English grammar, 1861, Civil War Imprints, Emory University. General Libraries. https://digital.library.emory.edu/purl/3009w0vxxg-cor.