MLA
Parke, Walter. The Skull Hunters! : a Terrific Tale of the Prairie!! Judy's Publishing Office, 1868. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/784zgmsbmj-cor.
APA, 6th edition
Parke, W. (1868). The skull hunters! : a terrific tale of the prairie!! [Printed wrappers (Binding)]. Judy's Publishing Office; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/784zgmsbmj-cor.
Chicago
Parke, Walter. “The Skull Hunters! : a Terrific Tale of the Prairie!!” Printed wrappers (Binding). Chester W. Topp Collection of Victorian Yellowbacks and Paperbacks. London: Judy's Publishing Office, 1868. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/784zgmsbmj-cor.