LIVESAY (John), . (2007). The 7 most Powerful Selling Secrets. New Delhi: Prentice Hall of India New Delhi.
LIVESAY (John), . 2007. The 7 most Powerful Selling Secrets. New Delhi: Prentice Hall of India New Delhi.
LIVESAY (John), . The 7 most Powerful Selling Secrets. New Delhi: Prentice Hall of India New Delhi. 2007.
