Rago, L. J. v. (1969). Production analysis and control. Longmans.
Lua i Stíl Chicago (17ú heag.)Rago, Louis J. von. Production Analysis and Control. Harlow: Longmans, 1969.
Lua MLA (9ú heag.)Rago, Louis J. von. Production Analysis and Control. Longmans, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.