Wear, George F.
Oxford University Press, 1950
Buku Teks
McIntosh, Enid
Oxford University Press, 1951
Buku Teks
Arini Fuspita
Program Pascasarjana Universitas Indonesia, 2012
UI - Tesis (Open)
Cambridge University Press, 1992
eBooks
Cambridge University Press, 2009
eBooks