Torrington, Derek, 1931-
Prentice-Hall, 1979
Buku Teks
Straus, George, author
Prentice-Hall, 1967
Buku Teks
Strauss, George, author
Prentice-Hall, 1980
Buku Teks
Strauss, George, author
Prentice Hall of India, 1985
Buku Teks
Stone, Thomas H
The Dryden Press, 1982
Buku Teks