Y ddau grwt 'na eto! /
Wiliam, Urien.
Davies, W. Mostyn.
Front, Charles.
Welsh Joint Education Committee.
Llandysul : Gomer,
1994.
Cyhoeddwyd dan nawdd Cynllun Llyfrau Darllen Cyd-bwyllgor Addysg Cymru = Published under the auspices of the Welsh Joint Education Committee Reading Books Project