Speight, H. (1970). Economics and industrial efficiency: An introduction to managerial economics (3rd ed.). Macmillan.
Lua i Stíl Chicago (17ú heag.)Speight, H. Economics and Industrial Efficiency: An Introduction to Managerial Economics. 3rd ed. [London]: Macmillan, 1970.
Lua MLA (9ú heag.)Speight, H. Economics and Industrial Efficiency: An Introduction to Managerial Economics. 3rd ed. Macmillan, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.