Bibliography: p177-186. _ Includes index.
Cyflwyniad i astudio'r iaith Gymraeg by David Thorne. ISBN 0708308929. Published by Cyhoeddwyd ar ran Bwrdd Gwybodau Celtaidd Prifysgol Cymru gan Wasg Prifysgol Cymru in 1985. Publication and catalogue information, links to buy online and reader comments.