APA (7th ed.) Citation

Spinrad, N., & Summers, L. (2009). Subjectivity. Project Gutenberg.

Chicago Style (17th ed.) Citation

Spinrad, Norman, and Leo Summers. Subjectivity. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Spinrad, Norman, and Leo Summers. Subjectivity. Project Gutenberg, 2009.

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