Hirsh, S. (2018). Information services today: An introduction (Second edition.). Rowman & Littlefield.
Cita Chicago (17th ed.)Hirsh, Sandra. Information Services Today: An Introduction. Second edition. Lanham: Rowman & Littlefield, 2018.
Cita MLA (9th ed.)Hirsh, Sandra. Information Services Today: An Introduction. Second edition. Rowman & Littlefield, 2018.
Atenció: Aquestes cites poden no estar 100% correctes.