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Practical research : planning and design / Paul D. Leedy, Late of American University, Jeanne Ellis Ormrod, University of Northern Colorado (Emerita).
- 001.42 L484 2016
- Leedy, Paul D.
- Pearson,
- c2016.
- Boston :
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Digital marketing / Dave Chaffey, Fiona Ellis-Chadwick.
- 658.872 C4334 2019
- Chaffey, Dave, 1963-
- Pearson,
- Harlow, England ; New York :