Cita APA (7th ed.)

Porter, M. E. (1998). Competitive Advantage (6th.). Tata McGraw-Hill Publishing Company Ltd.

Cita Chicago (17th ed.)

Porter, Michael E. Competitive Advantage. 6th. New Delhi: Tata McGraw-Hill Publishing Company Ltd, 1998.

Cita MLA (9th ed.)

Porter, Michael E. Competitive Advantage. 6th. Tata McGraw-Hill Publishing Company Ltd, 1998.