APA (7th ed.) Citation

Eustace, R., Meade, L. T., & Walton, J. A. (2007). A Master of Mysteries. Project Gutenberg.

Chicago Style (17th ed.) Citation

Eustace, Robert, L. T. Meade, and J. Ambrose Walton. A Master of Mysteries. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Eustace, Robert, et al. A Master of Mysteries. Project Gutenberg, 2007.

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