Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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