APA-referens (7:e uppl.)

DeGregori, T. R. (2004). Origins of the organic agriculture debate. Blackwell.

Chicago-referens (17:e uppl.)

DeGregori, Thomas R. Origins of the Organic Agriculture Debate. Iowa City: Blackwell, 2004.

MLA-referens (9:e uppl.)

DeGregori, Thomas R. Origins of the Organic Agriculture Debate. Blackwell, 2004.