D. R. Garrison (Garrison, D. R.)

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  E-Learning in the 21st Century : A Framework for Research and Practice
  by Randy Garrison, Terry Anderson
  Hardcover, Taylor & Francis Group, ISBN 041526345X (0-415-26345-X)
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  E-Learning in the 21st Century: A Framework for Research and Practice
  by Terry Anderson, D. R. Garrison
  Softcover, Falmer Pr, ISBN 0415263468 (0-415-26346-8)
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  Research Perspectives in Adult Education
  by D. R. Garrison
  Hardcover, Krieger Pub Co, ISBN 0894647164 (0-89464-716-4)
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  A Transactional Perspective on Teaching and Learning: A Framework for Adult and Higher Education
  by D. R. Garrison, Walter Archer, European Association for Research on Learning and Instruction
  Hardcover, Emerald Group Pub Ltd, ISBN 008043780X (0-08-043780-X)
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  Understanding Distance Education: A Framework for the Future
  by D. R. Garrison
  Hardcover, Routledge, ISBN 0415020905 (0-415-02090-5)