MLA
Du Boisgobey, Fortune?, 1821-1891. EMU10000453298. The old age of Lecoq, the detective, and, An omnibus mystery [Volume 1]. 1886. Chester W. Topp collection of Victorian yellowbacks and paperbacks. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/525k98sj48-cor.
APA, 6th edition
Du Boisgobey, Fortune?, 1821-1891. EMU10000453298. (1886)[The old age of Lecoq, the detective, and, An omnibus mystery [Volume 1]]. Chester W. Topp collection of Victorian yellowbacks and paperbacks, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/525k98sj48-cor.
Chicago
Du Boisgobey, Fortune?, 1821-1891. EMU10000453298, The old age of Lecoq, the detective, and, An omnibus mystery [Volume 1], 1886, Chester W. Topp collection of Victorian yellowbacks and paperbacks, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/525k98sj48-cor.