Hooft, G. '. (2008). Playing with planets (English ed.). World Scientific.
芝加哥风格引文Hooft, G. 't. Playing with Planets. English ed. Hackensack, NJ: World Scientific, 2008.
MLA引文Hooft, G. 't. Playing with Planets. English ed. World Scientific, 2008.
警告：这些引文格式不一定是100％准确.