Tec, Nechama
Oxford University Press, 2009
Buku Teks
Ranney, Austin
Holt, Rinehart and Winston , 1958
Buku Teks
Ranney, Austin
Prentice-Hall, 1993
Buku Teks
Austin, Erik W.
Columbia University Press, 1986
Buku Teks
Page, Edward, 1953-
Harvester Wheatsheaf, 1992
Buku Teks