Yeo, A. (2007). Trig or treat: An encyclopedia of trigonometric identity proofs (TIPs), intellectually challenging games. World Scientific Pub..
芝加哥风格引文Yeo, Adrian. Trig or Treat: An Encyclopedia of Trigonometric Identity Proofs (TIPs), Intellectually Challenging Games. Singapore: World Scientific Pub., 2007.
MLA引文Yeo, Adrian. Trig or Treat: An Encyclopedia of Trigonometric Identity Proofs (TIPs), Intellectually Challenging Games. World Scientific Pub., 2007.
警告：这些引文格式不一定是100％准确.