White, Patrick, 1971-
Developing research questions : a guide for social scientists
Palgrave Macmillan, 2009
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Babbie, Earl R.
Social research counts
Wadsworth and Cengage Learning, 2013 (International edition)
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Babbie, Earl R.
The practice of social research
Cengage Learning, 2016
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Research methods in social relations
Louise H. Kidder
Holt, Rinehart and Winston, 1981
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Sjoberg, Gideon
A methodology for social research
Harper & Row Publishers, 1968
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