Arg. Saesneg gwreiddiol = Original English ed.: Llundain: Collins Educational, 1993, 1995.
Yn cynnwys mynegai = Includes index.
Prosesau bywyd, oed 5-7 : canllaw athrawon. ISBN 1855963159. Published by Gwasg y Dref Wen in 1997. Publication and catalogue information, links to buy online and reader comments.