APA (7e ed.) Bronvermelding

(1970). Modern Business: Sales And Sales Management / Elmer G. Leterman. Alexander Hamilton Institute.

Chicago (17e ed.) Bronvermelding

Modern Business: Sales And Sales Management / Elmer G. Leterman. Alexander Hamilton Institute, 1970.

MLA (8e ed.) Bronvermelding

Modern Business: Sales And Sales Management / Elmer G. Leterman. Alexander Hamilton Institute, 1970.

Let op: Deze citaties zijn niet altijd 100% accuraat.