APA (7th ed.) Citation

Harmon, J., & Wood, W. (2010). The Planet with No Nightmare. Project Gutenberg.

Chicago Style (17th ed.) Citation

Harmon, Jim, and Wallace Wood. The Planet with No Nightmare. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Harmon, Jim, and Wallace Wood. The Planet with No Nightmare. Project Gutenberg, 2010.

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