APA (7th ed.) Citation

Gallun, R. Z. (2008). The Eternal Wall. Project Gutenberg.

Chicago Style (17th ed.) Citation

Gallun, Raymond Z. The Eternal Wall. Project Gutenberg, 2008.

MLA (9th ed.) Citation

Gallun, Raymond Z. The Eternal Wall. Project Gutenberg, 2008.

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