APA (7th ed.) Citation

Leinster, M. (2012). The Forgotten Planet. Project Gutenberg.

Chicago Style (17th ed.) Citation

Leinster, Murray. The Forgotten Planet. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Leinster, Murray. The Forgotten Planet. Project Gutenberg, 2012.

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