Wikipedia: Prodicus
- Article incorporating information from the 1911 Encyclopaedia Britannica.
- http://en.wikipedia.org/wiki/Prodicus

Internet Encyclopedia of Philosophy: Prodicus
- Short article on this leading Sophist.
- http://www.iep.utm.edu/p/prodicus.htm

Plato and His Dialogues: Prodicus of Ceos
- A resource provided by the Perseus Project, with links to every mention of this Sophist in Plato's dialogues.
- http://plato-dialogues.org/tools/char/prodicus.htm

Cosmos of the Ancients: Prodicus of Ceos
- Concise article on this thinker, by Stefan Stenudd.
- http://www.stenudd.com/myth/greek/prodicus.htm