.co.uk
http://www.bookdepository.co.uk/referafriend?a_aid=code
.com
http://www.bookdepository.com/referafriend?a_aid=code
Terms and Conditions:
You will receive one 10% voucher for referring friends and then additional vouchers for those who buy, only one voucher can be received for introductions in the first instance. Once a referred friend has bought from us we will send you a 10% voucher that can be used against your next purchase