Levin, J. (1977). Elementary statistics in social research (2nd ed.). Harper and Row.
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Chicago-čujuhus (17. p.)
Levin, Jack. Elementary Statistics in Social Research. 2nd ed. New York: Harper and Row, 1977.
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MLA-čujuhus (9. p.)
Levin, Jack. Elementary Statistics in Social Research. 2nd ed. Harper and Row, 1977.
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