Emory, W., & Cooper, D. R. (1993). Business research methods (4th ed.). National Book Store.
Cita Chicago Style (17a ed.)Emory, William, y Donald R. Cooper. Business Research Methods. 4th ed. Manila: National Book Store, 1993.
Cita MLA (9a ed.)Emory, William, y Donald R. Cooper. Business Research Methods. 4th ed. National Book Store, 1993.
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