Argraffiad Saesneg gwreiddiol = Original English edition : New York : Bantam Doubleday Dell, 1995.
Addasiad Cymraeg gan = Welsh adaptation by : Esyllt Nest Roberts.
Yr arth grisli by Gary Paulsen. ISBN 0863816827. Published by Gwasg Carreg Gwalch in 2001. Publication and catalogue information, links to buy online and reader comments.