APA (7th ed.) Citation

Coward, T. A. (2013). The Migration of Birds. Project Gutenberg.

Chicago Style (17th ed.) Citation

Coward, T. A. The Migration of Birds. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Coward, T. A. The Migration of Birds. Project Gutenberg, 2013.

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