Brinton, Crane, 1898-1968
Prentice-Hall, 1955
Buku Teks
Cambridge University Press, 2015
Buku Teks
Smith, Preserved
Cambridge University Press, 2014
eBooks
Hewlett, Richard G.
Pennsylvania State University Press, 1962
Buku Referensi
Murray, David
Routledge/Thoemmes Press, 1996
Buku Referensi