APA (7th ed.) Zitazioa

Porter, M. E. (1986). Competition in global industries. Harvard Business school.

Chicago Style (17th ed.) Zitazioa

Porter, Michael E. Competition in Global Industries. Boston: Harvard Business school, 1986.

MLA (9th ed.) Zitazioa

Porter, Michael E. Competition in Global Industries. Harvard Business school, 1986.