Mary H. Munroe (2004). "Pearson Timeline". The Academic Publishing Industry: A Story of Merger and Acquisition. Archived from the original on 2014-10-20 – via Northern Illinois University.
Mary H. Munroe (2004). "Pearson Timeline". The Academic Publishing Industry: A Story of Merger and Acquisition. Archived from the original on 2014-10-20 – via Northern Illinois University.