Epstein, Adam, author
Pearson/Prentice Hall, 2006
Buku Teks
Kaehlig, Carl-Bernd, author
Tata Nusa, 1993
Buku Referensi
Smith, Roger J., author
Longman, 2000
Buku Teks
Levy, Ernst, author
American Philosophical Society, 1951
Buku Teks
Colston, Catherine, author
Cavendish Publishing, 1999
Buku Teks