Kern, M. K. (2009). Virtual reference best practices: Tailoring services to your library. American Library Association.
Citace podle Chicago (17th ed.)Kern, M. Kathleen. Virtual Reference Best Practices: Tailoring Services to Your Library. Chicago: American Library Association, 2009.
Citace podle MLA (9th ed.)Kern, M. Kathleen. Virtual Reference Best Practices: Tailoring Services to Your Library. American Library Association, 2009.
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