APA (7th ed.) Citation

Dickens, C., & Williams, G. A. (2006). A Christmas Carol. Project Gutenberg.

Chicago Style (17th ed.) Citation

Dickens, Charles, and George Alfred Williams. A Christmas Carol. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Dickens, Charles, and George Alfred Williams. A Christmas Carol. Project Gutenberg, 2006.

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