APA (7e ed.) Bronvermelding

PORTER MICHAEL E. (1980). COMPETITIVE STRATEGY: TECHNIQUES FOR ANALYSING ...COMPETITORS. FREE PRESS.

Chicago (17e ed.) Bronvermelding

PORTER MICHAEL E. COMPETITIVE STRATEGY: TECHNIQUES FOR ANALYSING ...COMPETITORS. NEW YORK LONDON: FREE PRESS, 1980.

MLA (9e ed.) Bronvermelding

PORTER MICHAEL E. COMPETITIVE STRATEGY: TECHNIQUES FOR ANALYSING ...COMPETITORS. FREE PRESS, 1980.

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