JOHNSON, P. 0. (1949). Statistical methods in research.: Palmer O. Johnson. Prentice-Hall.
Chicago-čujuhus (17. p.)JOHNSON, Palmer 0. Statistical Methods in Research.: Palmer O. Johnson. Englewood Cliffs: Prentice-Hall, 1949.
MLA-čujuhus (9. p.)JOHNSON, Palmer 0. Statistical Methods in Research.: Palmer O. Johnson. Prentice-Hall, 1949.
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