George, H. (1989). Principal components analysis. Sage.
Chicago Style aipamenaGeorge, H.Dunteman. Principal Components Analysis. Newbury park: Sage, 1989.
MLA aipamenaGeorge, H.Dunteman. Principal Components Analysis. Sage, 1989.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.