Bell, E., Bryman, A., & Harley, B. (2019). Business research methods. oxford university Press.
Dyfyniad Arddull ChicagoBell, Emma, Alan Bryman, and Bill Harley. Business Research Methods. Oxford: oxford university Press, 2019.
Dyfyniad MLABell, Emma, et al. Business Research Methods. oxford university Press, 2019.
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