Caruth, D. L., & Rachel, F. M. (1972). Business systems: Articles, analysis, and cases. Canfield Press.
Lua i Stíl Chicago (17ú heag.)Caruth, Donald L., agus Frank M. Rachel. Business Systems: Articles, Analysis, and Cases. San Francisco: Canfield Press, 1972.
Lua MLA (9ú heag.)Caruth, Donald L., agus Frank M. Rachel. Business Systems: Articles, Analysis, and Cases. Canfield Press, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.