Howe, W. (1978). Industrial economics. Macmillan.
Lua i Stíl Chicago (17ú heag.)Howe, W. Industrial Economics. New Delhi: Macmillan, 1978.
Lua MLA (9ú heag.)Howe, W. Industrial Economics. Macmillan, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.