APA (7th ed.) Citation

Gould, N. (2011). The Second String. Project Gutenberg.

Chicago Style (17th ed.) Citation

Gould, Nat. The Second String. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Gould, Nat. The Second String. Project Gutenberg, 2011.

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