APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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