Ok, this is a via-via-via reference, found through the logistics quotes discussion on the Operations & Supply Chain Academic Group on LinkedIn. But the quote is nice nonetheless:
“Physical distribution is simply another way of saying “the whole process of business”.” Peter Drucker.
The entire discussion can be found here, and a white paper collecting all sorts of similar SCM / logistics quote can be downloaded here. Add your quotes so that they can be added to the white paper!
PS. addition on Jan 9, just found another blog full of quotes, here they are.