Cyhoeddiad Saesneg gwreiddiol = Original English ed.: London: William Heinemann, 1997.
Addasiad Cymraeg gan = Welsh adaptation by: Luned Whelan.
Wedi'i seilio ar y Railway Series gan W. Awdry = Based on the Railway Series by W. Awdry.
Teitl clawr = Cover title.
Dyma Tomos a'i ffrindiau by W. Awdry. ISBN 085284218X. Published by Hughes a'i Fab in 1997. Publication and catalogue information, links to buy online and reader comments.