Somek, Alexander, author
Oxford Univesity Press, 2014
Buku Teks
Corwin, Edward S., author
William Sloane, 1949
Buku Teks
Dinan, John, author
Oxford University Press, 2014
Buku Teks
Shukla`s, V.N.
Eastern Book Company, 1990
Buku Teks
Simorangkir, J.C.T., author
Djambatan, 1980
Buku Teks