TY  - BOOK
AU  - Chaffey, Dave
AU  - Smith, PR 
TI  - Digital marketing excellence: planning, optimizing and integrating online marketing
SN  - 9781138191709 
U1  - 658.872 CHA  
PY  - 2017///
CY  - London
PB  - Routledge
N1  - Includes bibliographical references and index 
ER  -