Cita APA (7th ed.)

SAS Institute & Ray, A. A. (1982). SAS/ETS user's guide (1982 ed.). SAS Institute.

Cita Chicago (17th ed.)

SAS Institute i Alice Allen Ray. SAS/ETS User's Guide. 1982 ed. Cary, N.C: SAS Institute, 1982.

Cita MLA (9th ed.)

SAS Institute i Alice Allen Ray. SAS/ETS User's Guide. 1982 ed. SAS Institute, 1982.