Spulber, D. F. (2004). Management strategy [ada CD]Daniel F. Spulber. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Spulber, Daniel F. Management Strategy [ada CD]Daniel F. Spulber. McGraw-Hill, 2004.
Lua MLA (8ú heag.)Spulber, Daniel F. Management Strategy [ada CD]Daniel F. Spulber. McGraw-Hill, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.