Shames, Irving H.
Prentice-Hall, 1980
Buku Teks
Titherington, D., author
Erlangga, 1984
Buku Teks
Singer, Ferdinand L., author
New York: Harper and Row, 1975
Buku Teks
Sandor, Bela I. (Bela Imre), author
Prentice-Hall, 1983
Buku Teks
Meriam, J. L. (James L.), author
John Wiley & Sons, 1978
Buku Teks