by Harper Collins Dictionaries
ISBN: 9780008300258
ISBN: 9780007569311
ISBN: 9780008141875
by Oxford Dictionaries
ISBN: 9780199692644
ISBN: 9780198408017
ISBN: 9780008183622
ISBN: 9780008241384
ISBN: 9780008257965
by Oxford University Press
ISBN: 9780199117918
ISBN: 9780199599554