APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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