MLA
On Her Majesty's Secret Service. J. and R. Maxwell, 1878. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/788cfxprr7-cor.
APA, 6th edition
On Her Majesty's secret service. (1878). [Yellowbacks., Mystery and detective fiction]. J. and R. Maxwell; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/788cfxprr7-cor.
Chicago
“On Her Majesty's Secret Service.” Yellowbacks., Mystery and detective fiction. Chester W. Topp Collection of Victorian Yellowbacks and Paperbacks. London: J. and R. Maxwell, 1878. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/788cfxprr7-cor.