APA (7th ed.) Citation

Vogel, R. M. (2010). The Engineering Contributions of Wendel Bollman. Project Gutenberg.

Chicago Style (17th ed.) Citation

Vogel, Robert M. The Engineering Contributions of Wendel Bollman. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Vogel, Robert M. The Engineering Contributions of Wendel Bollman. Project Gutenberg, 2010.

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