This website used the following sources:

Darwin, C. 18something.The Origin of Species. London, UK: Penguin.

Riley and Flindall, RE and JB. 2001. The Post Primordial Origins of Spoonerisms. Frome, UK: B & T.

Watt, T. 2002. The Spoon Theorem and its Implications on Popular Culture. Houston, Texas: Bators Master.

Revised: 04/19/04.