APA (7e ed.) Bronvermelding
Gardner, B. L. (2006). American agriculture in the twentieth century: How it flourished and what it cost. Harvard University Press.
Chicago (17e ed.) Bronvermelding
Gardner, Bruce L. American Agriculture in the Twentieth Century: How It Flourished and What It Cost. Cambridge, MA: Harvard University Press, 2006.
MLA (9e ed.) Bronvermelding
Gardner, Bruce L. American Agriculture in the Twentieth Century: How It Flourished and What It Cost. Harvard University Press, 2006.
Let op: Deze citaties zijn niet altijd 100% accuraat.