Arg. Saesneg gwreiddiol = Original English ed.: London : Egmont, 2005.
Crewyd ar gyfer y teledu gan Britt Allcroft. Seiliedig ar lyfrau y Parch. W. Awdry = Created for television by Britt Allcroft. Based on Rev. W. Awdry's books.
Llyfr bordyn = Board book.
Teitl o'r clawr = Title from cover.
Persi'n chwarae triciau. Published by Gwasg y Dref Wen in 2007. Publication and catalogue information, links to buy online and reader comments.