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Research design : qualitative, quantitative, and mixed methods approaches /

By Creswell, John W.. Los Angeles : SAGE Publications, 2014 . xxix, 273 pages : , Previous edition: 2008. Includes index. 9781452274614 | 9781452274607

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Case study research and applications : design and methods /

By Yin, Robert K.,. Los Angeles : SAGE Publications Ltd., 2018 . xxx, 319 pages : , Earlier editions called: Case study research : design and methods. 9781506336169 (pbk. : alk. paper)

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