Chaffey, Dave. <br/><br/>
Digital marketing excellence. 

 - 5 edition. 
 - London :  Taylor & Francis,  2017. 
 - 690 p. 
<br/><br/> Revised edition of the authors' Emarketing excellence, c2013. 
<br/><br/><label>ISBN: </label>1138191701 9781138191709