By Allen, Mark, Powell, Debra, Mark Allen, Debra Powell, Dickie Dolby
By O'Connell, Sue, Sue O'Connell
By Collins
By Louise Hashemi, Barbara Thomas
By Oxford Dictionaries
By Rawdon Wyatt
By Underhill, Adrian, Scrivener, Jim
By Lorna Knight
By Johnstone, Barbara
By Ur, Penny, Penny Ur
By Klippel, Friederike, Friederike Klippel
By Ur, Penny
By Penny Ur
By Eric Keller, Sylvia T. Warner
By Lightbown, Patsy M., Spada, Nina
By Carla Meskill, Natasha Anthony
By Ashton, Helen, Shepherd, Sarah
By Parminter, Sue, Bowler, Bill, Cunningham, Sarah, Moor, Peter
By Bowler, Bill, Cunningham, Sarah, Moor, Peter, Parminter, Sue
By Kathy Cox, David Hill
By Edward de Chazal, Sam McCarter
By Escott, John, McLean, Alan
By McLean, Alan, McLean, Alan
By Dallas, Ann, McLean, Alan, McLean, Alan
By W.L. Holderness
By Mark Collier and Bill Manley
By Grolier Educational