Cyhoeddwyd y fersiwn Saesneg gan = English ed. published by: Pearson Education Limited.
Addasiad Cymraeg gan = Welsh adaptation by: Colin Isaac, Lydia Jones, Melanie Davies.
Economeg safon uwch. Cyfrol 2 by A. G. Anderton. ISBN 1905255667. Published by @ebol in 2008. Publication and catalogue information, links to buy online and reader comments.