APA (7th ed.) Citation

Freeman, M. E. W. (2006). The Green Door. Project Gutenberg.

Chicago Style (17th ed.) Citation

Freeman, Mary Eleanor Wilkins. The Green Door. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Freeman, Mary Eleanor Wilkins. The Green Door. Project Gutenberg, 2006.

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