Kok, A. J. (1990). User modelling for data retrieval applications. Universiteit van Amsterdam.
Lua i Stíl Chicago (17ú heag.)Kok, Andreas Jozef. User Modelling for Data Retrieval Applications. Netherlands: Universiteit van Amsterdam, 1990.
Lua MLA (8ú heag.)Kok, Andreas Jozef. User Modelling for Data Retrieval Applications. Universiteit van Amsterdam, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.