Freud, J. E. (1988). Modern elementary statistics (7th ed.). Prentice-Hall.
Tohutoru Kātū Chicago (17th ed.)Freud, John E. Modern Elementary Statistics. 7th ed. New Jersey: Prentice-Hall, 1988.
Tohutoro MLA (9th ed.)Freud, John E. Modern Elementary Statistics. 7th ed. Prentice-Hall, 1988.
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