Brinton, Crane, 1898-1968, author
Prentice-Hall, 1963
Buku Teks
Hearnshaw, Leslie Spencer, author
Routledge , 1989
Buku Teks
Kearl, Michael C., author
Allyn and Bacon, 1992
Buku Teks
Sankar Muthu
Cambridge University Press, 2014
Buku Teks
Routledge, 2000
Buku Teks