Tabachnick, Barbara G., author
Allyn and Bacon, 2001
Buku Teks
Gnanadesikan, Ram, 1932-, author
John Wiley & Sons, 1977
Buku Teks
Cooley, William W., author
John Wiley & Sons, 1971
Buku Teks
Dunteman, George Henry
Sage Publications, 1984
Buku Teks
Patel, Rajnikant V.
Pergamon Press, 1982
Buku Teks