Creswell, J. W. (2016). 30 Essential Skills for the Qualitative Researcher. SAGE Publications, Inc.
Lua i Stíl Chicago (17ú heag.)Creswell, John W. 30 Essential Skills for the Qualitative Researcher. California: SAGE Publications, Inc, 2016.
Lua MLA (9ú heag.)Creswell, John W. 30 Essential Skills for the Qualitative Researcher. SAGE Publications, Inc, 2016.
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