Griffith, John R., author
Lexington Books, 1972
Buku Teks
Kothari, C.R., author
Vikas Publishing House, 1978
Buku Teks
Reinke, William A., author
The John Hopkins University Press , 1972
Buku Teks
Biegel, John E., author
Prentice-Hall, 1978
Buku Teks
Ozcan, Yasar A., author
Jossey- Bass, 2009
Buku Teks