APA (7th ed.) Citation

Dell, E. M. (2005). The Keeper of the Door. Project Gutenberg.

Chicago Style (17th ed.) Citation

Dell, Ethel M. The Keeper of the Door. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Dell, Ethel M. The Keeper of the Door. Project Gutenberg, 2005.

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