MLA
Ross, Charles H. (Charles Henry), 1842?-1897. The pretty widow. 1868. Chester W. Topp collection of Victorian yellowbacks and paperbacks. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/098z8w9kxq-cor.
APA, 6th edition
Ross, Charles H. (Charles Henry), 1842?-1897. (1868)[The pretty widow, New edition.]. Chester W. Topp collection of Victorian yellowbacks and paperbacks, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/098z8w9kxq-cor.
Chicago
Ross, Charles H. (Charles Henry), 1842?-1897, The pretty widow, 1868, Chester W. Topp collection of Victorian yellowbacks and paperbacks, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/098z8w9kxq-cor.