APA (7th ed.) Citation

Warder, J. A. (2011). American Pomology Apples. Project Gutenberg.

Chicago Style (17th ed.) Citation

Warder, J. A. American Pomology Apples. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Warder, J. A. American Pomology Apples. Project Gutenberg, 2011.

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