Trout, J., & Rivkin, S. (2008). Differentiate or die: Survival in our era of killer competition (2nd ed.). Wiley.
Lua i Stíl Chicago (17ú heag.)Trout, Jack, agus Steve Rivkin. Differentiate or Die: Survival in Our Era of Killer Competition. 2nd ed. Hoboken, N.J: Wiley, 2008.
Lua MLA (9ú heag.)Trout, Jack, agus Steve Rivkin. Differentiate or Die: Survival in Our Era of Killer Competition. 2nd ed. Wiley, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.