Arg Saesneg gwreiddiol = Original English ed: London: John Murray, 1989.
"Cyhoeddir ... fel rhan o Raglen Ddatblygu Addysg Hyblyg a ariennir gan ADAG ac a weinyddir yng Nghymru gan Gyd-bwyllgor Addysg Cymru".
Tonnau a dirgryniadau. Published by CBAC in 1991. Publication and catalogue information, links to buy online and reader comments.