edited by John Zumerchik
MacMillan Library Reference USA, 1997
Buku Referensi
edited by John Zumerchik
MacMillan Library Reference USA, 1997
Buku Referensi
Laura, R.S.^qRonald S.
London Partridge Press 1993,
Buku Teks
Siekmann, R.C.R.
T.M.C. Asser Press, 2012
eBooks
Milroy, Patrick
Ward Lock Book, 1994
Buku Referensi