ebrary, Inc, Henle, M., & Hopkins, B. (2012). Martin Gardner in the twenty-first century. Mathematical Association of America.
芝加哥风格引文ebrary, Inc, Michael Henle, 与 Brian Hopkins. Martin Gardner in the Twenty-first Century. Washington, D.C.: Mathematical Association of America, 2012.
MLA引文ebrary, Inc, et al. Martin Gardner in the Twenty-first Century. Mathematical Association of America, 2012.
警告：这些引文格式不一定是100％准确.