McBurney, D. H. (2001). Research methods (Fifth edition.). Cengage Learning.
Chicago-viite (17. p.)McBurney, Donald H. Research Methods. Fifth edition. Belmont, CA: Cengage Learning, 2001.
MLA-viite (8. p.)McBurney, Donald H. Research Methods. Fifth edition. Cengage Learning, 2001.
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