Hammond John S. (1999). Smart Choices. Harvard Business.
Lua i Stíl Chicago (17ú heag.)Hammond John S. Smart Choices. Boston: Harvard Business, 1999.
Lua MLA (9ú heag.)Hammond John S. Smart Choices. Harvard Business, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.