Cita APA (7th ed.)
Porter, M. E. (1986). Competition in global industries. Harvard Business school.
Cita Chicago (17th ed.)
Porter, Michael E. Competition in Global Industries. Boston: Harvard Business school, 1986.
Cita MLA (9th ed.)
Porter, Michael E. Competition in Global Industries. Harvard Business school, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.