APA (7th ed.) Citation

Whitefield, P. (1993). Permaculture in a nutshell. Permanent Publications.

Chicago Style (17th ed.) Citation

Whitefield, Patrick. Permaculture in a Nutshell. Hampshire, Eng.: Permanent Publications, 1993.

MLA (9th ed.) Citation

Whitefield, Patrick. Permaculture in a Nutshell. Permanent Publications, 1993.

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