APA (7e ed.) Bronvermelding

PORTER MICHAEL E. (1985). COMPETITIVE ADVANTAGE. FREE PRESS.

Chicago (17e ed.) Bronvermelding

PORTER MICHAEL E. COMPETITIVE ADVANTAGE. NEW YORK: FREE PRESS, 1985.

MLA (9e ed.) Bronvermelding

PORTER MICHAEL E. COMPETITIVE ADVANTAGE. FREE PRESS, 1985.