@book{139261,
	author = {Williamson, Nicholas Carlton.},
	title = {Salesperson motivation and performance :},
	publisher = {UMI Research Press,},
	year = {c1982.},
	address = {Ann Arbor, Mich. :},
	note = {Revision of thesis (Ph.D.)--University of North Carolina at Chapel Hill, 1980.}
}