TY  - BOOK
AU  - Chaffey, Dave
AU  -  Smith,PR
TI  - Emarketing excellenve: planning and optimizing your digital marketing 
SN  - 9780415533379
U1  - 658.8002854678 
PY  - 2015///
CY  - New York
PB  - Routledge
N1  - includs index
ER  -