Rigby, P. H. (1965). Conceptual foundations of business research. John Wiley and sons.
Dyfyniad Arddull ChicagoRigby, Paul H. Conceptual Foundations of Business Research. London: John Wiley and sons, 1965.
Dyfyniad MLARigby, Paul H. Conceptual Foundations of Business Research. John Wiley and sons, 1965.
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