Elkins, William R., author
McGraw-Hill, 1982
Buku Teks
Mahathir bin Mohamad, 1925-, author
Pelanduk Publications, 2002
Buku Teks
Chomsky, Noam, author
Fontana/Collins , 1975
Buku Teks
Morgan, Charles, author
Macmillan, 1946
Buku Teks
Stern, Jessica
London, 1999
Buku Teks