Παραπομπή σε μορφή APA (7η εκδ.)

Yeo, A. (2007). Trig or treat: An encyclopedia of trigonometric identity proofs (TIPs), intellectually challenging games. World Scientific Pub..

Παραπομπή σε μορφή Chicago (17η εκδ.)

Yeo, Adrian. Trig or Treat: An Encyclopedia of Trigonometric Identity Proofs (TIPs), Intellectually Challenging Games. Singapore: World Scientific Pub., 2007.

Παραπομπή σε μορφή MLA (9th εκδ.)

Yeo, Adrian. Trig or Treat: An Encyclopedia of Trigonometric Identity Proofs (TIPs), Intellectually Challenging Games. World Scientific Pub., 2007.