Tohutoro APA (7th ed.)
Spence, J. T., & Cotton, J. W. (1990). Elementary statistics (5th ed.). Prentice Hall.
Tohutoru Kātū Chicago (17th ed.)
Spence, Janet T., me John W. Cotton. Elementary Statistics. 5th ed. New Jersey: Prentice Hall, 1990.
Tohutoro MLA (9th ed.)
Spence, Janet T., me John W. Cotton. Elementary Statistics. 5th ed. Prentice Hall, 1990.
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