TY  - GEN
AU  - Berger, Jonah
TI  - Contagious : how to build word of mouth in the digital age
SN  - 9781471111709
U1  - 659.133 
PY  - 2009///
CY  - London
PB  - Simon & Schuster
KW  - Word-of-mouth advertising; Viral marketing; New products
ER  -