APA (7th ed.) Citation

Leonard, M. F. (2006). The Story of the Big Front Door. Project Gutenberg.

Chicago Style (17th ed.) Citation

Leonard, Mary Finley. The Story of the Big Front Door. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Leonard, Mary Finley. The Story of the Big Front Door. Project Gutenberg, 2006.

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