Mulder, Niels, author
Gajah Mada University Press, 1992
Buku Teks
Watson, Adam, author
Routledge, 1992
Buku Teks
Hackett, Brian, author
Percival Marshal, 1950.
Buku Teks
Steinberg, David J. (David Joel), author
Hraf Press, 1059
Buku Teks
Barnett, Clifford R., author
Hraf Press, 1958
Buku Teks