Lewis, Ralph F., author
Heinemann, 1974
Buku Teks
Welsch, Glenn A., author
Prentice-Hall, 1970
Buku Teks
Gardner, Fred V., author
McGraw-Hill, 1955
Buku Teks
Bierman, Harold, author
The Free Press, 1980
Buku Teks
Hicks, Ursula K., author
Clarendon Press, 1969
Buku Teks