APA (7th ed.) Citation

Porter, M. E. (1991). On competition and strategy. A harvard business review paperback.

Chicago Style (17th ed.) Citation

Porter, Michael E. On Competition and Strategy. U.S.A: A harvard business review paperback, 1991.

MLA (9th ed.) Citation

Porter, Michael E. On Competition and Strategy. A harvard business review paperback, 1991.

Warning: These citations may not always be 100% accurate.