Oxford advanced learner's dictionary of current English / A.S. Hornby
: pbk + DVD pack,: [ja pbk. + DVD pack],: hbk + DVD pack. - 9th ed. / managing editors, Margaret Deuter, Jennifer Bradbery, Joanna Turnbull ; editors, Leonie Hey, Suzanne Holloway ; speaking tutor, Mark Hancock ; phonetics editor, Michael Ashby. - Oxford : Oxford University Press , 2015