Recco, W. (2002). 501 algebra questions. Learning Express.
芝加哥风格引文Recco, William. 501 Algebra Questions. New York: Learning Express, 2002.
MLA引文Recco, William. 501 Algebra Questions. Learning Express, 2002.
警告：这些引文格式不一定是100％准确.
APA引文