Hardwick, P., & Khan, B. (1994). An introduction to modern economics (4th.ed.). Longman.
Lua i Stíl Chicago (17ú heag.)Hardwick, Philip, agus Bahadur Khan. An Introduction to Modern Economics. 4th.ed. London: Longman, 1994.
Lua MLA (9ú heag.)Hardwick, Philip, agus Bahadur Khan. An Introduction to Modern Economics. 4th.ed. Longman, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.