MLA
Mahan, D. H. (Dennis Hart), 1802-1871. Summary of the course of permanent fortification and of the attack and defence of permanent works : for the use of the cadets of the U.S. Military Academy. 1863. Civil War Imprints. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/81937pvqws-cor.
APA, 6th edition
Mahan, D. H. (Dennis Hart), 1802-1871. (1863)[Summary of the course of permanent fortification and of the attack and defence of permanent works : for the use of the cadets of the U.S. Military Academy]. Civil War Imprints, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/81937pvqws-cor.
Chicago
Mahan, D. H. (Dennis Hart), 1802-1871, Summary of the course of permanent fortification and of the attack and defence of permanent works : for the use of the cadets of the U.S. Military Academy, 1863, Civil War Imprints, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/81937pvqws-cor.