Watts,Perry. (2002). Multiple-Plot Displays: Simplified with Macros (Art Carpenter's SAS Software) (NA.). SAS.
Lua i Stíl Chicago (17ú heag.)Watts,Perry. Multiple-Plot Displays: Simplified with Macros (Art Carpenter's SAS Software). NA. USA: SAS, 2002.
Lua MLA (9ú heag.)Watts,Perry. Multiple-Plot Displays: Simplified with Macros (Art Carpenter's SAS Software). NA. SAS, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.