APA (7th ed.) Citation

Doughty, W. E. (2010). The Call of the World or, Every Man's Supreme Opportunity. Project Gutenberg.

Chicago Style (17th ed.) Citation

Doughty, W. E. The Call of the World or, Every Man's Supreme Opportunity. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Doughty, W. E. The Call of the World or, Every Man's Supreme Opportunity. Project Gutenberg, 2010.

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