Higgins, L. (1978). Cost reduction from A to Z. McGraw Hill.
Lua i Stíl Chicago (17ú heag.)Higgins, L. Cost Reduction from A to Z. New Delhi: McGraw Hill, 1978.
Lua MLA (9ú heag.)Higgins, L. Cost Reduction from A to Z. McGraw Hill, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.