Christensen, C. M. (2004). Seeing What's Next. HBS.
Lua i Stíl Chicago (17ú heag.)Christensen, Clayton M. Seeing What's Next. HBS, 2004.
Lua MLA (9ú heag.)Christensen, Clayton M. Seeing What's Next. HBS, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.