Detholiad o rannau o 14 llyfr yn y gyfres a elwir Cyfres y cewri wedi eu haddasu ar gyfer darllenwyr sy'n dysgu Cymraeg = A selection of parts from 14 books in the series entitled Cyfres y cewri adapted for readers who are learning Welsh.
Cip ar y cewri. ISBN 0860741702. Published by Gwasg Gwynedd in 2000. Publication and catalogue information, links to buy online and reader comments.