APA (7e ed.) Bronvermelding

RIES AL. (1989). BOTTOM-UP MARKETING. MCGRAW-HILL.

Chicago (17e ed.) Bronvermelding

RIES AL. BOTTOM-UP MARKETING. NEW YORK: MCGRAW-HILL, 1989.

MLA (9e ed.) Bronvermelding

RIES AL. BOTTOM-UP MARKETING. MCGRAW-HILL, 1989.