APA (7th ed.) Citation

Doughty, F. W. (2014). How to Become an Engineer. Project Gutenberg.

Chicago Style (17th ed.) Citation

Doughty, Frank W. How to Become an Engineer. Project Gutenberg, 2014.

MLA (9th ed.) Citation

Doughty, Frank W. How to Become an Engineer. Project Gutenberg, 2014.

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