APA (7th ed.) Citation

Howells, W. D., & Alden, H. M. (2008). Shapes that Haunt the Dusk. Project Gutenberg.

Chicago Style (17th ed.) Citation

Howells, William Dean, and Henry Mills Alden. Shapes That Haunt the Dusk. Project Gutenberg, 2008.

MLA (9th ed.) Citation

Howells, William Dean, and Henry Mills Alden. Shapes That Haunt the Dusk. Project Gutenberg, 2008.

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