Thorkildsen, T. A. (2005). Fundamentals of measurement in applied research. Pearson/Allyn and Bacon.
Lua i Stíl Chicago (17ú heag.)Thorkildsen, Theresa A. Fundamentals of Measurement in Applied Research. Boston: Pearson/Allyn and Bacon, 2005.
Lua MLA (9ú heag.)Thorkildsen, Theresa A. Fundamentals of Measurement in Applied Research. Pearson/Allyn and Bacon, 2005.
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