Robereto Michael A. Mount Everest ---- 1996. Harvard Business.
Cita Chicago (17th ed.)Robereto Michael A. Mount Everest ---- 1996. : Harvard Business.
Cita MLA (9th ed.)Robereto Michael A. Mount Everest ---- 1996. Harvard Business.
Atenció: Aquestes cites poden no estar 100% correctes.