Lehmann, D. R. (2002). Product management (3rd ed.). TMH.
Cita Chicago (17th ed.)Lehmann, Donald R. Product Management. 3rd ed. New Delhi: TMH, 2002.
Cita MLA (9th ed.)Lehmann, Donald R. Product Management. 3rd ed. TMH, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.