APA (7th ed.) Citation

Tolstoy, L., Maude, L., & Maude, A. (2008). The Cause of it All. Project Gutenberg.

Chicago Style (17th ed.) Citation

Tolstoy, Leo, Louise Maude, and Aylmer Maude. The Cause of It All. Project Gutenberg, 2008.

MLA (9th ed.) Citation

Tolstoy, Leo, et al. The Cause of It All. Project Gutenberg, 2008.

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