Palmer, R.R. (Robert Roswell), 1909-2002, author
Princeton University Press, 1964
Buku Teks
Padgett, Stephen
Longman, 1991
Buku Teks
Kraus, Herbert
Schimmelbusch, 1953
Buku Teks
Meny, Yves
Oxford University Press, 1998
Buku Teks
Schroder, Gerhard
Thames and Hudson, 1964
Buku Teks