Cita APA (7a ed.)

PORTER, M. E. (1980). Competitive Strategy Techniques For Analyzing Industies And Competitors Michael E. Porter. the Free Press.

Cita Chicago Style (17a ed.)

PORTER, Michael E. Competitive Strategy Techniques For Analyzing Industies And Competitors Michael E. Porter. the Free Press, 1980.

Cita MLA (8a ed.)

PORTER, Michael E. Competitive Strategy Techniques For Analyzing Industies And Competitors Michael E. Porter. the Free Press, 1980.