APA (7th ed.) Citation

Hale, G. E. (2006). The New Heavens. Project Gutenberg.

Chicago Style (17th ed.) Citation

Hale, George Ellery. The New Heavens. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Hale, George Ellery. The New Heavens. Project Gutenberg, 2006.

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