Watts,Perry. (2002). Multiple-Plot Displays: Simplified with Macros (Art Carpenter's SAS Software) (NA.). SAS.
Chicago-viite (17. p.)Watts,Perry. Multiple-Plot Displays: Simplified with Macros (Art Carpenter's SAS Software). NA. USA: SAS, 2002.
MLA-viite (9. p.)Watts,Perry. Multiple-Plot Displays: Simplified with Macros (Art Carpenter's SAS Software). NA. SAS, 2002.
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