Mitchell, M., & Jolley, J. (1988). Research design explained. Holt, Reinehart and Winston.
Chicago Style (17th ed.) ZitazioaMitchell, Mark, eta Janina Jolley. Research Design Explained. New York: Holt, Reinehart and Winston, 1988.
MLA (9th ed.) ZitazioaMitchell, Mark, eta Janina Jolley. Research Design Explained. Holt, Reinehart and Winston, 1988.
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