@book{6392,
	author = {Doff, Adrian and Jones, Christopher},
	title = {Language in Use: Teacher's book Pre-Intermediate New Edition /},
	publisher = {Cambridge University Press ,},
	year = {2001.},
	address = {Edinburgh :},
	edition = {2nd ed.},
	url = {https://books.google.com.pk/books?id=rul8Bfnfc1QC&printsec=frontcover&dq=0521774047&hl=en&sa=X&redir_esc=y#v=onepage&q=0521774047&f=false}
}