APA引文
Gardner, B. L. (2006). American agriculture in the twentieth century: How it flourished and what it cost. Harvard University Press.
芝加哥风格引文
Gardner, Bruce L. American Agriculture in the Twentieth Century: How It Flourished and What It Cost. Cambridge, MA: Harvard University Press, 2006.
MLA引文
Gardner, Bruce L. American Agriculture in the Twentieth Century: How It Flourished and What It Cost. Harvard University Press, 2006.
警告：这些引文格式不一定是100％准确.