Iarlles /
McCaughrean, Geraldine.
Jones, Ann Wynn.
Smithson, Colin.
Caerdydd : Camfa,
1997.
Cyhoeddiad Saesneg gwreiddiol = Original English ed.: Harlow : Longman Group, 1994.
Addasiad Cymraeg gan = Welsh adaptation by: Ann Wynn Jones
Welsh language