Cita APA (7a ed.)

Porter, M. E. (1998). Competitive Strategy (ain.). Simon & Schuster UK Ltd.

Cita Chicago Style (17a ed.)

Porter, Michael E. Competitive Strategy. ain. Great Brit: Simon & Schuster UK Ltd, 1998.

Cita MLA (9a ed.)

Porter, Michael E. Competitive Strategy. ain. Simon & Schuster UK Ltd, 1998.