Levin, J. (1977). Elementary statistics in social research (2nd ed.). Harper and Row.
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Dyfyniad Arddull Chicago
Levin, Jack. Elementary Statistics in Social Research. 2nd ed. New York: Harper and Row, 1977.
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Dyfyniad MLA
Levin, Jack. Elementary Statistics in Social Research. 2nd ed. Harper and Row, 1977.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.