Lehmann, D. R. (2002). Product management (3rd ed.). TMH.
Lua i Stíl Chicago (17ú heag.)Lehmann, Donald R. Product Management. 3rd ed. New Delhi: TMH, 2002.
Lua MLA (9ú heag.)Lehmann, Donald R. Product Management. 3rd ed. TMH, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.