MLA
Pettigrew, James Johnston, 1828-1863. Notes on Spain and the Spaniards : in the summer of 1859, with a glance at Sardinia. 1861. Civil War Imprints. Emory University. General Libraries. https://digital.library.emory.edu/purl/9010p2nm0j-cor.
APA, 6th edition
Pettigrew, James Johnston, 1828-1863. (1861)[Notes on Spain and the Spaniards : in the summer of 1859, with a glance at Sardinia]. Civil War Imprints, Emory University. General Libraries. https://digital.library.emory.edu/purl/9010p2nm0j-cor.
Chicago
Pettigrew, James Johnston, 1828-1863, Notes on Spain and the Spaniards : in the summer of 1859, with a glance at Sardinia, 1861, Civil War Imprints, Emory University. General Libraries. https://digital.library.emory.edu/purl/9010p2nm0j-cor.