APA (7th ed.) Citation

Smith, E. E. (2009). The Doorway. Project Gutenberg.

Chicago Style (17th ed.) Citation

Smith, Evelyn E. The Doorway. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Smith, Evelyn E. The Doorway. Project Gutenberg, 2009.

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