Mann, Prem S, author
John Wiley & Sons, 1995
Buku Teks
Yamane, Taro, author
Harper & Row , 1973
Buku Teks
Weiss, Neil
Addison-Wesley Pub. Co., 1982
Buku Teks
Yamane, Taro, author
New York University, 1967
Buku Teks
Bradley, Iver E., author
Dryden Press, 1981
Buku Teks