Brandi, Karl
Jonathan Cape, 1949
Buku Teks
Götze, Heinz, author
Prestel, 1998
Buku Teks
Sakamoto, Taro
The International Society for Educational Information, 1984.
Buku Teks
Symons, Julian, author
Arthur Barker, 1951
Buku Teks
Fielding, K.J., author
Longman, Green, 1953
Buku Teks