TY  - BOOK
A2  - Dave Chaffey and PR Smith. 
A3  - Smith, Paul Russell.
AU  - Chaffey, Dave. 
ET  - 3rd ed. 
NV  - XVIII, 508 s. : 
PY  - 2008
SN  - 9780750689458
TI  - eMarketing eXcellence :  planning and optimizing your digital marketing / 
ER  -