Dietrich Neumann
Yale University Press, 2001
Buku Teks
Robinson, Richard, author
At The Clarendon Press, 1954
Buku Teks
Gardner, Richard A.
Jason Aronson Inc., 1993
Buku Teks
Preston, Richard
Random House, 1994
Buku Teks
Sudjic, Deyan, author
Fourth Estate and Wordsearch, 1994
Buku Teks