1995
Buku Teks
White, N.D., author
Manchester University Press, 1993
Buku Teks
Orrego Vicuna, Fransisco, author
Cambridge University Press, 2004
Buku Teks
Merrills, J.G., author
Cambridge University Press, 1995
Buku Teks
Merrills, J.G., author
Sweet and Maxwell, 1984
Buku Teks