Afifi, A. A., Clark, V., & May, S. (2012). Practical multivariate analysis (5th ed.). Taylor & Francis.
Lua i Stíl Chicago (17ú heag.)Afifi, A. A., Virginia Clark, agus Susanne May. Practical Multivariate Analysis. 5th ed. Boca Raton: Taylor & Francis, 2012.
Lua MLA (9ú heag.)Afifi, A. A., et al. Practical Multivariate Analysis. 5th ed. Taylor & Francis, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.