PL 712 (Diw 16) Ar y clawr = On cover: Deddfwriaeth cyflogaeth. Teitl clawr = Cover title.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Wedi'ch diswyddo'n annheg?. Published by DTI in 2001. Publication and catalogue information, links to buy online and reader comments.