Macmillan Press Limited, 1988
Buku Referensi
Deacy, Christopher, author
Blackwell Publishing, 2008
Buku Teks
Watson, Jean, author
Davis, 2005
Buku Teks
Wosien, Maria-Gabriele
Thames and Hudson, 1992
Buku Teks
Watson, Jean, author
Davis, 2005
Buku Teks