Barnett, Stephen
Clarendon Press, 1990
Buku Teks
Burghes, David N.
John Wiley & Sons, 1980
Buku Teks
Brogan, William L.
Prentice-Hall, 1991
Buku Teks
edited by Paul Van Dooren and Bostwick Wyman
Springer-Verlag, 1994
Buku Teks
Tou, Julius T.
McGraw-Hill, 1964
Buku Teks