ebrary, Inc, & Columbus, A. (2011). Politics and economics of Africa. Nova Science Publishers, Inc..
芝加哥风格引文ebrary, Inc, 与 Alexandra Columbus. Politics and Economics of Africa. New York: Nova Science Publishers, Inc., 2011.
MLA引文ebrary, Inc, 与 Alexandra Columbus. Politics and Economics of Africa. Nova Science Publishers, Inc., 2011.
警告：这些引文格式不一定是100％准确.