Tohutoro APA (7th ed.)
Freund, J. E. (1960). Modern elementary statistics (2d ed.). Prentice-Hall.
Tohutoru Kātū Chicago (17th ed.)
Freund, John E. Modern Elementary Statistics. 2d ed. Englewood Cliffs, N.J.: Prentice-Hall, 1960.
Tohutoro MLA (9th ed.)
Freund, John E. Modern Elementary Statistics. 2d ed. Prentice-Hall, 1960.
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