APA (7th ed.) Citation

Moore, D. T., & Kossin, S. (2010). The Double Spy. Project Gutenberg.

Chicago Style (17th ed.) Citation

Moore, Dan T., and Sandy Kossin. The Double Spy. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Moore, Dan T., and Sandy Kossin. The Double Spy. Project Gutenberg, 2010.

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