Oppenheim, C., & Citroen, C. L. (1989). Perspectives in information management 1. Butterworths.
Lua i Stíl Chicago (17ú heag.)Oppenheim, Charles, agus Charles L. Citroen. Perspectives in Information Management 1. London: Butterworths, 1989.
Lua MLA (9ú heag.)Oppenheim, Charles, agus Charles L. Citroen. Perspectives in Information Management 1. Butterworths, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.