Arg. Saesneg gwreiddiol = Original English ed.: London: Macmillan Publishers, 1997.
Cefin y cyw : llyfr sefyll-i-fyny = Kevin the chicken : a pop-up book by Nick Denchfield. ISBN 1855963752. Published by Gwasg y Dref Wen in 1999. Publication and catalogue information, links to buy online and reader comments.