APA-čujuhus (7. p.)

WALKER, H. M. (1969). Elementary statistical methods. Holt, Rinehart and Winston.

Chicago-čujuhus (17. p.)

WALKER, Helen M. Elementary Statistical Methods. New York: Holt, Rinehart and Winston, 1969.

MLA-čujuhus (9. p.)

WALKER, Helen M. Elementary Statistical Methods. Holt, Rinehart and Winston, 1969.

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