Artikel Jurnal
Reichert, Jonathan F., author
Prentice-Hall, 1991
Buku Teks
Eisenberg, Martin A., author
Addison-Wesley, 1980
Buku Teks
Popov, Egor P., author
Prentice Hall of India, 1979
Buku Teks
Lai, W. Michael, author
Pergamon Press, 1978
Buku Teks