Bank, Marcus
Visual methods in social research
Sage Publications, 2001
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Research methods in the social sciences
edited, Bridget Somekh, Cathy Lewin
Sage Publications , 2005
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Dunn, Dana S.
Research methods for social psychology
Wiley-Blackwell, 2009
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Crano, William D.
Principles and methods of social research
Lawrence Erlbaum Assossiate, 2002
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Goode, William J.
Methods in social research
McGraw-Hill, 1952
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