Nickname and mascot
http://english.villarrealcf.es/el-club/historia-del-villarreal-cf/historia-de-la-mascota
http://english.villarrealcf.es/el-club/historia-del-villarreal-cf/historia-de-la-mascota
Club colours
Book sources - Wikipedia
https://en.wikipedia.org/wiki/Special:BookSources/978-0-9540134-6-2International Standard Book Number - Wikipedia
https://en.wikipedia.org/wiki/ISBN_(identifier)