Schork, M. Anthony
Prentice-Hall, 2000
Buku Teks
Sokal, Robert R.
W.H. Freeman, 1969
Buku Teks
Finney, D.J.
Chapman & Hall, 1980
Buku Teks SO
Samuel, Myra L.
Pearson - Prentice Hall, 2003
Buku Teks
Dunn, Olive Jean
John Wiley & Sons, 1977
Buku Teks SO