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Hane, Paula J. (October 2001). "Reed Elsevier Sells Bowker to CSA, ITI". Information Today; Medford. Vol. 18, no. 9. pp. 1–70. ISSN8755-6286. ProQuest214842745.
Mary H. Munroe (2004). "Cambridge Information Group Timeline". The Academic Publishing Industry: A Story of Merger and Acquisition. Archived from the original on October 20, 2014 – via Northern Illinois University.
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Hane, Paula J. (October 2001). "Reed Elsevier Sells Bowker to CSA, ITI". Information Today; Medford. Vol. 18, no. 9. pp. 1–70. ISSN8755-6286. ProQuest214842745.