Wartzman, R. (2013). Drucker. TMH.
Cita Chicago (17th ed.)Wartzman, Rick. Drucker. New Delhi: TMH, 2013.
Cita MLA (9th ed.)Wartzman, Rick. Drucker. TMH, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)