Cita APA (7a ed.)

Porter, M. E., & Montgomery, C. A. (1991). Strategy: Seeking and securing competitive advantage. Harvard Business School Press.

Cita Chicago Style (17a ed.)

Porter, Michael E., y Cynthia A. Montgomery. Strategy: Seeking and Securing Competitive Advantage. Boston (Mass.): Harvard Business School Press, 1991.

Cita MLA (9a ed.)

Porter, Michael E., y Cynthia A. Montgomery. Strategy: Seeking and Securing Competitive Advantage. Harvard Business School Press, 1991.