Y brenin blin /
Cullimore, Stan.
Creunant, Gwenan.
Kavanagh, Peter.
Curriculum and Assessment Authority for Wales.
Caerdydd : Camfa,
1997.
Arg. Saesneg gwreiddiol = Original English ed.: Harlow : Longman Group, 1994.
Addasiad Cymraeg gan = Welsh adaptation by: Gwenan Creunant.
Kings and rulers