Berg, Bruce Lawrence, 1954-
Qualitative reseach methods for the social sciences
Allyn and Bacon, 1989
 Buku Teks
Berg, Bruce Lawrence, 1954-
Qualitative research methods for the social sciences
Pearson, 2014
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Gravetter, Frederick J.
Research methods for the behavioral sciences
Wadsworth, 2012
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Gravetter, Frederick J.
Research methods for the behavioral sciences
CT Cengage Learning, 2016
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Gravetter, Frederick J.
Research methods for the behavioral sciences
Cengage, 2018
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