Caruso, Domenick, author
W.W. Norton, 1977
Buku Teks
Jaderstrom, Susan, author
McGraw-Hill Glencoe, 2003
Buku Teks
James, C.V.
Prentice-Hall, 1992
Buku Teks
Swan, Michael, author
Oxford University Press, 1995
Buku Teks
Frank, Marcella, author
Prentice-Hall, 1972
Buku Teks