MLA
Warner, John S. Isabel De Cordova, or, The Brethren of the Coast : a Tale of the Sea and Land [Volume 3:1]. G. Routledge and Sons, 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/634sj3tzkk-cor.
APA, 6th edition
Warner, J. S. (1861). Isabel de Cordova, or, The brethren of the coast : a tale of the sea and land [Volume 3:1] [Yellowbacks.]. G. Routledge and Sons; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/634sj3tzkk-cor.
Chicago
Warner, John S. “Isabel De Cordova, or, The Brethren of the Coast : a Tale of the Sea and Land [Volume 3:1].” Yellowbacks. Chester W. Topp Collection of Victorian Yellowbacks and Paperbacks. London: G. Routledge and Sons, 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/634sj3tzkk-cor.