@book{
title = {Preparing for Trinity CEFR B1 },
author = {Betsis, Andrew},
editor = {Haughton, Sean},
editor = {Mamas, Lawrence},
editor = {L'ultimo compl. del tit. dalla cop },
editor = {In calce al front. e in cop.: Trinity College London },
editor = {Tit. del CD allegato: ISE 1.-CEFR B1, listening & speaking },
year = {2016},
address = {Brighton},
publisher = {Global ELT},
}