Glendon, Mary Ann
West Academic Publishing, 1999
Buku Teks
David, Rene, 1906-
Stevens & sons, 1985
Buku Teks SO
Gutteridge, H. C.
Cambridge University Press, 1949
Buku Teks
Glendon, Mary Ann
West Academic Publishing, 1994
Buku Teks SO
Orucu, A. Esin
Inaugural Lecture, 1982
Buku Teks SO