APA (7e ed.) Bronvermelding

PORTER MICHAEL E. (1998). COMPETITIVE STRATEGY: TECHNIQUES FOR ANALYZING INDU AND COMPETITORS. FREE PRESS.

Chicago (17e ed.) Bronvermelding

PORTER MICHAEL E. COMPETITIVE STRATEGY: TECHNIQUES FOR ANALYZING INDU AND COMPETITORS. NEW YORK: FREE PRESS, 1998.

MLA (9e ed.) Bronvermelding

PORTER MICHAEL E. COMPETITIVE STRATEGY: TECHNIQUES FOR ANALYZING INDU AND COMPETITORS. FREE PRESS, 1998.

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