Russell, John David, author
Johns Hopkins University Press, 1979
Buku Teks
Cambridge University Press, 2003
eBooks
Karl, Frederick R., author
Thames & Hudson, 1970
Buku Teks
Tindall, William York, author
Books for Libraries Press, 1947
Buku Teks
edited by Theo D`Haen and Hans Bertens
Rodopi, 1993
Buku Teks