Cyhoeddwyd er budd = Published for the benefit of: Eisteddfod Genedlaethol yr Urdd, Dyffryn Nantlle ac Arfon, 1990.
Rasb'ri ripl a straeon eraill : casgliad o droeon trwstan rhai Cymry amlwg. ISBN 1871913179. Published by Y Ganolfan Astudiaethau Iaith ar ran Pwyllgor Apêl yr Urdd, Llanrug in 1990. Publication and catalogue information, links to buy online and reader comments.