Futcher, W. (1976). Decriptive statistics for introductory measurement. Andrews University Press.
Lua i Stíl Chicago (17ú heag.)Futcher, W.G.A. Decriptive Statistics for Introductory Measurement. Andrews University Press, 1976.
Lua MLA (9ú heag.)Futcher, W.G.A. Decriptive Statistics for Introductory Measurement. Andrews University Press, 1976.
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