APA (7th ed.) Citation

Grey, J. W., & Reeve, A. B. (2005). The Master Mystery. Project Gutenberg.

Chicago Style (17th ed.) Citation

Grey, John W., and Arthur B. Reeve. The Master Mystery. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Grey, John W., and Arthur B. Reeve. The Master Mystery. Project Gutenberg, 2005.

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