APA-referens (7:e uppl.)

Porter, M. E. (1998). On competition. Harvard Businesss School Publishing.

Chicago-referens (17:e uppl.)

Porter, Michael E. On Competition. Boston: Harvard Businesss School Publishing, 1998.

MLA-referens (9:e uppl.)

Porter, Michael E. On Competition. Harvard Businesss School Publishing, 1998.