Porter, M. E. (1991). On competition and strategy. A harvard business review paperback.
Chicago Style (17th ed.) CitationPorter, Michael E. On Competition and Strategy. U.S.A: A harvard business review paperback, 1991.
MLA (9th ed.) CitationPorter, Michael E. On Competition and Strategy. A harvard business review paperback, 1991.
Warning: These citations may not always be 100% accurate.