APA (7th ed.) Citation

Mershon, W. B. (2014). The Passenger Pigeon. Project Gutenberg.

Chicago Style (17th ed.) Citation

Mershon, W. B. The Passenger Pigeon. Project Gutenberg, 2014.

MLA (9th ed.) Citation

Mershon, W. B. The Passenger Pigeon. Project Gutenberg, 2014.

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