ESSINGER JAMES. (1999). SEVEN DEADLY SKILLS OF COMPETING. INTERNATIONAL THOMSON BUSINESS PRESS.
Citazione stile Chigago Style (17a edizione)ESSINGER JAMES. SEVEN DEADLY SKILLS OF COMPETING. LONDON: INTERNATIONAL THOMSON BUSINESS PRESS, 1999.
Citatione MLA (9a ed.)ESSINGER JAMES. SEVEN DEADLY SKILLS OF COMPETING. INTERNATIONAL THOMSON BUSINESS PRESS, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.