Cyhoeddwyd yn wreiddiol o dan y teitl = Originally published under title : 'Jabas' : Pen-y-groes, Gwynedd : Gwasg Dwyfor, 1986.
Jabas Jones by Penri Jones. ISBN 1860853641. Published by Uned Iaith Genedlaethol Cymru CBAC in 2000. Publication and catalogue information, links to buy online and reader comments.