Kluwer Academic , 1995
Buku Teks
Blackson, Thomas A., author
Wiley-Blackwell, 2011
Buku Teks
Hampshire, Stuart
The New American Library, 1960
Buku Teks
Guthrie, W.K.C., author
Cambridge University Press, 1989
Buku Teks
Frankfort, Henriette Antonia, author
Penguin Books, 1949
Buku Teks