Hirsh, S. (2022). Information services today: An introduction (Third edition.). Rowman & Littlefield.
Lua i Stíl Chicago (17ú heag.)Hirsh, Sandra. Information Services Today: An Introduction. Third edition. Lanham: Rowman & Littlefield, 2022.
Lua MLA (9ú heag.)Hirsh, Sandra. Information Services Today: An Introduction. Third edition. Rowman & Littlefield, 2022.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.