Cita APA (7th ed.)
Mc-Graw-Hill de management. McGraw Hill.
Cita Chicago (17th ed.)
Mc-Graw-Hill De Management. Madrid: McGraw Hill.
Cita MLA (9th ed.)
Mc-Graw-Hill De Management. McGraw Hill.
Atenció: Aquestes cites poden no estar 100% correctes.