Rose, John David, author
Authorhouse, 2005
Buku Teks
Sutherland, Edwin H., author
Yale University Press, 1983
Buku Teks
McGraw-Hill, 2012
Buku Referensi
Doyle, Leonard A., author
Univesity of California Press, 1965
Buku Teks
Fernandez, Ronald, author
Addison-Wesley, 1983
Buku Teks