Whittaker, K. (1993). The Basics of library-based user services. Library Association.
Chicago-referens (17:e uppl.)Whittaker, Kenneth. The Basics of Library-based User Services. Library Association, 1993.
MLA-referens (8:e uppl.)Whittaker, Kenneth. The Basics of Library-based User Services. Library Association, 1993.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.