Steffensen, A. R. (1992). College algebra: A problem-solving approach (2nd.ed.). Harper Collins.
芝加哥风格引文Steffensen, Arnold R. College Algebra: A Problem-solving Approach. 2nd.ed. New York: Harper Collins, 1992.
MLA引文Steffensen, Arnold R. College Algebra: A Problem-solving Approach. 2nd.ed. Harper Collins, 1992.
警告：这些引文格式不一定是100％准确.