Tohutoro APA (7th ed.)
Levin, R. I. (1987). Statistics for management (4th ed.). Prentice-Hall.
Tohutoru Kātū Chicago (17th ed.)
Levin, Richard I. Statistics for Management. 4th ed. Englewood Cliffs, N.J.: Prentice-Hall, 1987.
Tohutoro MLA (9th ed.)
Levin, Richard I. Statistics for Management. 4th ed. Prentice-Hall, 1987.
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