APA (7e ed.) Bronvermelding

RIES AL. (1986). POSITIONING: THE BATTLE FOR YOUR MINDS. MCGRAW-HILL.

Chicago (17e ed.) Bronvermelding

RIES AL. POSITIONING: THE BATTLE FOR YOUR MINDS. NEW YORK: MCGRAW-HILL, 1986.

MLA (9e ed.) Bronvermelding

RIES AL. POSITIONING: THE BATTLE FOR YOUR MINDS. MCGRAW-HILL, 1986.