Arg Saesneg gwreiddiol = Original English ed.: London: Darton Longman & Todd, 1986.
Ar drothwy goleuni : gweddi a moliant o'r traddodiad Celtaidd. ISBN 094893056X. Published by Cymdeithas Lyfrau Ceredigion in 1992. Publication and catalogue information, links to buy online and reader comments.