Goode, William J.
Methods in social research
McGraw-Hill, 1952
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Lee, Raymond M.
Unobtrusive methods in social research
Open University Press, 2000
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Reinharz, Shulamit
Feminist methods in social research
Oxford University Press, 1992
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Methods of research in social psychology
Elliot Aronson...[et al.]
McGraw-Hill , 1990
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Research methods in the social sciences
edited, Bridget Somekh, Cathy Lewin
Sage Publications , 2005
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