Guttman, Irwin
John Wiley & Sons, 1982
Buku Teks
Yamane, Taro
New York University, 1967
Buku Teks
Bradley, Iver E.
Dryden Press, 1981
Buku Teks
Miller, Sidney L.
Reston Publishing, 1981
Buku Teks
McKillup, Steve
Cambridge University Press, 2011
Buku Teks