White, Paul A., author
Dickenson, 1968
Buku Teks
Beckenbach, Edwin F., author
Wadsworth, 1968
Buku Teks
Vance, Elbridge P., author
Addison-Wesley, 1962
Buku Teks
Moore, John T., author
Macmillan, 1969
Buku Teks
Kay, David A., author
Neb Cliffs Notes, 1994
Buku Teks