Siekmann, R.C.R.
T.M.C. Asser Press, 2012
eBooks
Dick, Frank W., author
Bloomsbury, 2014
Buku Teks
Robinson, O.F., author
Frofessional Books Limited, 1985
Buku Teks
Thody, Philip, author
Routledge , 1997
Buku Teks
Sedgwick, Peter R., author
Blackwell, 2001
Buku Teks