Institute, S. (1985). SAS user's guide: Basics. Cary, N.C. : SAS Institute.
Lua i Stíl Chicago (17ú heag.)Institute, SAS. SAS User's Guide: Basics. Cary, N.C. : SAS Institute, 1985.
Lua MLA (9ú heag.)Institute, SAS. SAS User's Guide: Basics. Cary, N.C. : SAS Institute, 1985.
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