The communicative teaching of english  : principles and an exercice typology 
/ ed. and translated for the english by Christopher ; with contributions from Christopher N Candlin, Christoph Edelhoft, Ulrich Grewer [et al] 
. - 1ère éd. 
. - Harlow  : Longman, c1981
. - 229 p.  : ill.  ; 22 cm. 
<br/><br/><label>ISBN: </label>0582550645 
<br/><br/><label>Source: </label> Don 
<br/><br/><label>Universal Decimal Class. No.: </label>802. 0