Fowler, C. W. Systemic management. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Fowler, Charles W. Systemic Management. Oxford University Press.
Lua MLA (8ú heag.)Fowler, Charles W. Systemic Management. Oxford University Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.