APA (7th ed.) Citation

Grey, Z. (1990). The spirit of the border. Project Gutenberg.

Chicago Style (17th ed.) Citation

Grey, Zane. The Spirit of the Border. Champaign, Ill: Project Gutenberg, 1990.

MLA (9th ed.) Citation

Grey, Zane. The Spirit of the Border. Project Gutenberg, 1990.

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