Beckmann, Poul, author
McGraw-Hill, 1995
Buku Teks
edited by Maggie Toy
Academy Editions, 1999
Buku Teks
Mcdermott, Richard T., author
Lexing Publishing, 2000
Buku Teks
Boxer, A. H., author
Melbourne University Press, 1966
Buku Teks
Friedmann, Wolfgang, 1907-1972, author
Little, Brown, 1959
Buku Teks