Heringa, A.W., author
Metro, 2009
Buku Teks
Morris, Michael A, author
Palgrave Macmillan, 2016
Buku Teks
Pollitt, Christopher, author
Oxford University Press, 2011
Buku Teks
Jayapalan, N.
Atlantic Publishers and Distributors, 2002
Buku Teks
M. Nasroen, author
Aksara Baru, 1986
Buku Teks