Harnett, D. L. (1980). Introductory statistical analysis (2nd ed.). Addison-Wesley Publishing Company.
Lua i Stíl Chicago (17ú heag.)Harnett, Donald L. Introductory Statistical Analysis. 2nd ed. Reading, Massachusetts: Addison-Wesley Publishing Company, 1980.
Lua MLA (9ú heag.)Harnett, Donald L. Introductory Statistical Analysis. 2nd ed. Addison-Wesley Publishing Company, 1980.
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