@book{
title = {Teacher's guide and tests two},
author = {Spiazzi, Marina},
editor = {Layton, Margaret},
editor = {Tavella, Marina},
editor = {998016576708896 - Performer B1 with PET tutor - 2.2 -  },
editor = {Contenuti online, riservati agli insegnanti, al sito online.zanichelli.it/performerB1 },
year = {2015},
address = {Bologna },
publisher = {Zanichelli},
}