
Arg Saesneg gwreiddiol = Original English ed: Heinemann Educational, 1990.
Llyfr yn trafod = Book discusses: "Y Llyfr sgiliau"; "Iach a heini"; "Diddori"; "Goroesi".
Dylunio a thechnoleg mewn proses : pecyn adnoddau athrawon. ISBN 1871913438. Published by Canolfan Astudiaethau Iaith in 1993. Publication and catalogue information, links to buy online and reader comments.