APA (7th ed.) Citation

Marks, W. K. (2010). The Mind Digger. Project Gutenberg.

Chicago Style (17th ed.) Citation

Marks, Winston K. The Mind Digger. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Marks, Winston K. The Mind Digger. Project Gutenberg, 2010.

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