Czegel, B. (2001). Technical support on the web: Designing and maintaining an effective E-Support site. New York: John Wiley & Sons, Inc.
Chicago-tyylinen lähdeviittausCzegel, Barbara. Technical Support On the Web: Designing and Maintaining an Effective E-Support Site. New York: John Wiley & Sons, Inc, 2001.
MLA-viiteCzegel, Barbara. Technical Support On the Web: Designing and Maintaining an Effective E-Support Site. New York: John Wiley & Sons, Inc, 2001.
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