Forsyth, P. (2009). 100 great sales ideas: From leading companies around the world. Marshall Cavendish Business.
Citazione stile Chigago Style (17a edizione)Forsyth, Patrick. 100 Great Sales Ideas: From Leading Companies Around the World. London: Marshall Cavendish Business, 2009.
Citatione MLA (9a ed.)Forsyth, Patrick. 100 Great Sales Ideas: From Leading Companies Around the World. Marshall Cavendish Business, 2009.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.