Bames, Charles W., author
John Wiley & Sons, 1980
Buku Teks
edited by Samuel Rapport and Helen Wright
New American Library, 1962
Buku Teks
Read, H.H., author
ELBS and Macmillan, 1975
Buku Teks
Read, H.H., author
ELBS and Macmillan, 1975
Buku Teks
Tarbuck, Edward J., author
Maxwell Macmillan, 1993
Buku Teks