Sage handbook of mixed methods in social & behavioral research
Abbas Tashakkori, Charles Teddlie
SAGE Publications, 2010
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The SAGE encyclopedia of qualitative research methods
Sage Publications, 2008
 eBooks
Goode, William J.
Methods in social research
McGraw-Hill, 1952
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Galtung, Johan
Theory and methods of social research
George Allen and Unwin, 1969
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Research Methods in Social Relations
Claire Selltiz ... [et all]
Methuen & Co. LTD, 1965
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