DICKSON DEN. (1986). IMPROVE YOUR BUSINESS: WORK BOOK. INTERNATIONAL LABOUR ORGANIZATION.
Chicago (17e ed.) BronvermeldingDICKSON DEN. IMPROVE YOUR BUSINESS: WORK BOOK. GENEVA: INTERNATIONAL LABOUR ORGANIZATION, 1986.
MLA (9e ed.) BronvermeldingDICKSON DEN. IMPROVE YOUR BUSINESS: WORK BOOK. INTERNATIONAL LABOUR ORGANIZATION, 1986.
Let op: Deze citaties zijn niet altijd 100% accuraat.