Cita APA (7a ed.)

PORTER MICHAEL E. (1983). CASES IN COMPETITIVE STRATEGY. FREE PRESS.

Cita Chicago Style (17a ed.)

PORTER MICHAEL E. CASES IN COMPETITIVE STRATEGY. NEW YORK LONDON: FREE PRESS, 1983.

Cita MLA (9a ed.)

PORTER MICHAEL E. CASES IN COMPETITIVE STRATEGY. FREE PRESS, 1983.