Leterman, E. G. (1973). Modern business: Sales and sales management. Alexander Hamilton Institute.
Chicago Style citaatLeterman, Elmer G. Modern Business: Sales and Sales Management. New York: Alexander Hamilton Institute, 1973.
MLA citatieLeterman, Elmer G. Modern Business: Sales and Sales Management. Alexander Hamilton Institute, 1973.
Let op: Deze citaties zijn niet altijd 100% accuraat.