APA (7th ed.) Citation

Walton, O. F. (2009). Poppy's Presents. Project Gutenberg.

Chicago Style (17th ed.) Citation

Walton, O. F. Poppy's Presents. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Walton, O. F. Poppy's Presents. Project Gutenberg, 2009.

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