APA (7th ed.) Citation

Blade, A., & Rognan, L. (2009). Zero Hour. Project Gutenberg.

Chicago Style (17th ed.) Citation

Blade, Alexander, and Lloyd Rognan. Zero Hour. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Blade, Alexander, and Lloyd Rognan. Zero Hour. Project Gutenberg, 2009.

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