Cita APA (7a ed.)

Porter, M. E. (1985). Technology and competitive advantage. [s.n.].

Cita Chicago Style (17a ed.)

Porter, Michael E. Technology and Competitive Advantage. [S.l.]: [s.n.], 1985.

Cita MLA (9a ed.)

Porter, Michael E. Technology and Competitive Advantage. [s.n.], 1985.