La différence doit s’envisager comme un moyen de créer de la valeur
P: http://www.youtube.com/watch?v=cXpFD7gi8R0
B: http://www.youtube.com/watch?v=X8rmRjmVne4&feature=related
http://www.youtube.com/watch?v=0t0UuHvMI18&feature=related
http://www.youtube.com/watch?v=itCc6EAgPrc&feature=related
http://www.youtube.com/watch?v=axxoV3YDMgo&feature=related
http://www.youtube.com/watch?v=02kJmeox6J0&feature=related
! http://www.youtube.com/watch?v=0bGbRV6nA20&feature=related
F:http://www.youtube.com/watch?v=ogNoA0H9T3E
T: http://www.youtube.com/watch?v=-taUfmQL4-w&feature=related
L: http://www.youtube.com/watch?v=otlJOF8Or3g&feature=related
O: http://www.youtube.c