APA (7th ed.) Citation

Brown, W. P. (2004). Our Pilots in the Air. Project Gutenberg.

Chicago Style (17th ed.) Citation

Brown, William Perry. Our Pilots in the Air. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Brown, William Perry. Our Pilots in the Air. Project Gutenberg, 2004.

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