Barker, Chris
Research methods in clinical and counselling psychology
John Wiley & Sons, 1994
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Goodwin, C. James
Research in psychology : methods and design
John Wiley & Sons, 2005
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Goodwin, C. James
Research in psychology: methods and design
Wiley , 2010
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Christensen, Larry B., 1941-
Research methods, design, and analysis
Pearson Education, 2015
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Grobbee, Diederick E.
Clinical epidemiology : principles, methods, and applications for clinical research
Jones and Bartlett Publishers , 2015
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