Sellers, David, author
[Springer, ], 2012
eBooks
Withers, Audrey
Peter wen, 1994
Buku Teks
Goodrich, Chauncey A., author
Bobbs-Merrill, 1963
Buku Teks
Radzinowicz, Sir Leon
Routledge, 1999.
Buku Teks
Elwall, Robert, author
Academy Editions, 1996
Buku Teks