Prosiect gwasanaethau arbenigol plant a phobl ifanc (GAPPI) : safonau Cymru gyfan ar gyfer gwasanaethau gastroenteroleg, hepatoleg a maeth paedistrig : gwsanaethau gofal iechyd arbenigol plant a phobl. ISBN 0750437618. Published by Llywodraeth Cynulliad Cymru in 2005. Publication and catalogue information, links to buy online and reader comments.