Keuth, Herbert, 1940-
Cambridge University Press, 2005
Buku Teks SO
Foreign Languages Publishing House, 1892
Buku Teks SO
Flew, Antony
Thames and Hudson, 1989
Buku Teks SO
Corvi, Roberta
Routledge, 1997
Buku Teks
edited by John K. Ryan
The Catholic University of America Press, 1963
Buku Teks SO