Nikolaus, v. K., & Watts, P. M. (1986). The game of spheres. The Janus library.
芝加哥风格引文Nikolaus, von Kues, 与 Pauline Moffitt Watts. "The Game of Spheres." The Janus Library 1986.
MLA引文Nikolaus, von Kues, 与 Pauline Moffitt Watts. "The Game of Spheres." The Janus Library, 1986.
警告：这些引文格式不一定是100％准确.