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 . - 3rd ed . - Los Angeles : Sage, cop. 2009 . - XXIX, 260 p. 24 cm
978-1-4129-6557-6 Brochado

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