Helferich, G. (2007). High cotton: Four seasons in the Mississippi Delta. Counterpoint.
芝加哥风格引文Helferich, Gerard. High Cotton: Four Seasons in the Mississippi Delta. New York: Counterpoint, 2007.
MLA引文Helferich, Gerard. High Cotton: Four Seasons in the Mississippi Delta. Counterpoint, 2007.
警告：这些引文格式不一定是100％准确.