Cambrigde University Press , 2012
Buku Teks
Cambridge University Press, 2018
eBooks
Heringa, A.W., author
Metro, 2009
Buku Teks
Stannard, Harold, author
Adam and Charles Black, 1949
Buku Teks
Cappeletti, Mauro
The Bobbs - Merrill Company,INC, 1979
Buku Teks