Arg Saesneg gwreiddiol = Original English ed: London: Scripture Union, 1990.
Ffeil o ffeithiau 2 : deunydd diddorol i glybiau ieuenctid ac ysgolion Sul : i rai dros 11 oed by Terry Dunnell. ISBN 1874410151. Published by Cyhoeddiadau'r Gair in 1992. Publication and catalogue information, links to buy online and reader comments.