Van Lill, C. F. M. (1999). A model for user needs and information use studies in library and information services.
Lua i Stíl Chicago (17ú heag.)Van Lill, Cecilla Francina Martina. A Model for User Needs and Information Use Studies in Library and Information Services. 1999.
Lua MLA (8ú heag.)Van Lill, Cecilla Francina Martina. A Model for User Needs and Information Use Studies in Library and Information Services. 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.