Downie, N., & Heath, R. W. (1970). Basic statistical methods (3rd ed.). Harper & Row.
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Chicago-čujuhus (17. p.)
Downie, N.M, juo R. W. Heath. Basic Statistical Methods. 3rd ed. New York: Harper & Row, 1970.
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MLA-čujuhus (9. p.)
Downie, N.M, juo R. W. Heath. Basic Statistical Methods. 3rd ed. Harper & Row, 1970.
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