Zikmund, William G., author
Business research methods
The Dryden Press , 1991
 Buku Teks
Lorie, James H., author
Basic methods of marketing research
NMcGraw-Hill , 1951
 Buku Teks
Evaluative research : strategies and methods
American Institutes For Research
American Institutes For Research, 1970
 Buku Teks
Goode, William J., author
Methods in social research
McGraw-Hill, 1952
 Buku Teks
Research methods in social relations
by Claire Selltiz [and others]
Holt, Rinehart and Winston, 1959
 Buku Teks
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