Bellows, Roger, author
Prentice-Hall, 1962
Buku Teks
Brink, Victor Z., author
Prentice-Hall, 1971
Buku Teks
Macdonald, 1970
Buku Teks
Humphrey, Thomas J., author
John Wiley & Sons, 1978
Buku Teks
Jennings, Eugene E., author
Harper & Row, 1962
Buku Teks