Osbourn, Derek
Mitchell Publishing, 1989
Buku Teks SO
edited by David C. Hoaglin, Frederick Mosteller and John W. Tukey
John Wiley & Sons, 1991
Buku Teks
Myatt, L.J.
Pergamon Press, 1968
Buku Teks SO
Mann, H.B.
Dover, 1949
Buku Teks SO
Dunn, Olive Jean
John Wiley & Sons, 1974
Buku Teks SO