Hamilton, L. C. (2013). Statistics with Stata: Updated for version 12. Brooks/Cole, Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Hamilton, Lawrence C. Statistics with Stata: Updated for Version 12. Boston, MA: Brooks/Cole, Cengage Learning, 2013.
Lua MLA (8ú heag.)Hamilton, Lawrence C. Statistics with Stata: Updated for Version 12. Brooks/Cole, Cengage Learning, 2013.
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