Arg Saesneg gwreiddiol = Original English ed: London: Bodley Head, 1988.
Arg Cymraeg cyntaf = First Welsh ed: 1988.
Llyfr mawr Alffi a Lili Mei by Shirley Hughes. ISBN 0948930403. Published by Cymdeithas Lyfrau Ceredigion. Publication and catalogue information, links to buy online and reader comments.