APA (7th ed.) Citation

Allen, W. F. (2006). English Walnuts What You Need to Know about Planting, Cultivating and Harvesting This Most Delicious of Nuts. Project Gutenberg.

Chicago Style (17th ed.) Citation

Allen, Walter Fox. English Walnuts What You Need to Know About Planting, Cultivating and Harvesting This Most Delicious of Nuts. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Allen, Walter Fox. English Walnuts What You Need to Know About Planting, Cultivating and Harvesting This Most Delicious of Nuts. Project Gutenberg, 2006.

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