Arg. Saesneg gwreiddiol = Original English ed: Cambridge: National College Trust Ltd, 1990.
Teitl clawr = Cover title.
Prosesu dogfennau sy'n ymwneud â nwyddau a gwasanaethau. ISBN 1856442381. Published by Canolfan Astudiaethau Addysg in 1993. Publication and catalogue information, links to buy online and reader comments.