Pintel, Gerald, author
Prentice-Hall, 1989
Buku Teks
Kruglak, Haym, author
McGraw-Hill, 1963
Buku Teks
Clarkson, Donald R.
The Shoe String Press, 1964
Buku Teks
Goldish, Dorothy M., author
Macmillan, 1990
Buku Teks
Fowler, F. Parker, author
Wiley, 1962
Buku Teks