www.youtube.com/watch?v=qXQDLImL_hE
Sandler:
One-2-one
up front contract/customer commitment
water tight compartment : step by step
SPIN:
Robert Neivert.
Video on youtube: www.youtube.com/watch?v=14yz_-I3aPg
1- Preliminary
2- Investigation
3- Demonstration
4- Commitment