McCarthy, Gerry
Macmillan, 1987
Buku Teks
Stoddard, Edward
The Dial Press, 1962
Buku Teks
Kostiner, Edward
Barron's Educational Series Inc. , 1992
Buku Teks
Plotkin, Stanley A.
W.B. Saunders Company, 1994
Buku Teks
Taborsky, Edward
Princenton University Press , 1961
Buku Teks