Tohutoro APA (7th ed.)
Levin, R. I. (1981). Statistics for management (2nd ed.). Prentice-Hall.
Tohutoru Kātū Chicago (17th ed.)
Levin, Richard I. Statistics for Management. 2nd ed. Englewood Cliffs, N.J.: Prentice-Hall, 1981.
Tohutoro MLA (9th ed.)
Levin, Richard I. Statistics for Management. 2nd ed. Prentice-Hall, 1981.
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