Tomos y Tanc : Deffra, deffra, tyrd i chwarae! /
Beylon, Cathy.
Awdry, W.
Whelan, Luned.
Caerdydd : Hughes a'i Fab,
1996.
Arg. Saesneg cyntaf = First English ed.: Llundain: Heinemann, 1996.
'Wdi'i seilio ar y 'Railway series' gan y Parch. W. Awdry' -back cover.
Addasiad Cymraeg o = Welsh adaptation of: Thomas the Tank Engine in Peep, Peep, are you asleep?
Thomas the Tank Engine (Fictitious character)
Steam locomotives