Trafferth i Letang a Sioned /
Naidoo, Beverley.
Davies, Siân.
Röhr-Rouendaal, Petra.
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: Sian Vaughan Evans Davies.
Hamsters