Creswell,, John W. Research design : qualitative, quantitative and mixed methods approaches / John W. Creswell

Research design : qualitative, quantitative and mixed methods approaches / John W. Creswell . - 4th ed . - Thousand Oaks : Sage, cop. 2014 . - XXIX, 273 p. : il. 26 cm
978-1-4522-7461-4 Brochado

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