Wray, R. D. (2009). Christmas trees for pleasure and profit (4th ed.). Rutgers University Press.
芝加哥风格引文Wray, Robert D. Christmas Trees for Pleasure and Profit. 4th ed. New Brunswick, N.J.: Rutgers University Press, 2009.
MLA引文Wray, Robert D. Christmas Trees for Pleasure and Profit. 4th ed. Rutgers University Press, 2009.
警告：这些引文格式不一定是100％准确.