Zikmund, W., Babin, B., Carr, J., & Griffin, M. (2012). Business research methods. Cengage Learning.
CITATION STYLE
Zikmund, W. G., Carr, J. C., Griffi, M., & Fuller-jacobsen, B. (2010). Business Research Methods. South-Western, Cengage Learning, 8(1), 1–18.
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