APA (7th ed.) Citation

Grey, Z. (2010). Riders of the purple sage. Project Gutenberg.

Chicago Style (17th ed.) Citation

Grey, Zane. Riders of the Purple Sage. To be supplied: Project Gutenberg, 2010.

MLA (8th ed.) Citation

Grey, Zane. Riders of the Purple Sage. Project Gutenberg, 2010.

Warning: These citations may not always be 100% accurate.