APA (7th ed.) Citation

Mitford, B. (2008). The Sign of the Spider. Project Gutenberg.

Chicago Style (17th ed.) Citation

Mitford, Bertram. The Sign of the Spider. Project Gutenberg, 2008.

MLA (9th ed.) Citation

Mitford, Bertram. The Sign of the Spider. Project Gutenberg, 2008.

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