Bechtold, B. (1989). Statistics for business... PWS-KENT.
Lua i Stíl Chicago (17ú heag.)Bechtold, Brigitte. Statistics for Business... Boston: PWS-KENT, 1989.
Lua MLA (9ú heag.)Bechtold, Brigitte. Statistics for Business... PWS-KENT, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.