Doudnikoff, B. (1973). Information retrieval. Auerbach Publishers Inc.
Lua i Stíl Chicago (17ú heag.)Doudnikoff, Basil. Information Retrieval. Philadelphia: Auerbach Publishers Inc, 1973.
Lua MLA (9ú heag.)Doudnikoff, Basil. Information Retrieval. Auerbach Publishers Inc, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.