Riders of the purple sage :
a novel /
by Zane Grey ... ; illustrated by Douglas Duer.
APA Citation
Grey, Z., Duer, D., Duer, D., Harper & Brothers. (1912). Riders of the purple sage: a novel. New York: Harper & Brothers.
MLA Citation
Grey, Zane, 1872-1939, Douglas Duer, Douglas Duer, and Harper & Brothers. Riders of the Purple Sage: a Novel. New York: Harper & Brothers, 1912.
Warning: These citations may not always be complete (especially for serials).