APA (7th ed.) Citation

Henry, O. (1999). Whirligigs. Project Gutenberg.

Chicago Style (17th ed.) Citation

Henry, O. Whirligigs. Project Gutenberg, 1999.

MLA (9th ed.) Citation

Henry, O. Whirligigs. Project Gutenberg, 1999.

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