ebrary, Inc, & Ehrstrom, H. J. (2009). Effects of liberalizing world agricultural trade. Nova Science.
芝加哥风格引文ebrary, Inc, 与 Henrick J. Ehrstrom. Effects of Liberalizing World Agricultural Trade. New York: Nova Science, 2009.
MLA引文ebrary, Inc, 与 Henrick J. Ehrstrom. Effects of Liberalizing World Agricultural Trade. Nova Science, 2009.
警告：这些引文格式不一定是100％准确.