APA (7th ed.) Citation

Pearson, T. G. (2007). The Bird Study Book. Project Gutenberg.

Chicago Style (17th ed.) Citation

Pearson, T. Gilbert. The Bird Study Book. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Pearson, T. Gilbert. The Bird Study Book. Project Gutenberg, 2007.

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