Rodriguez, Rita M., author
Prentice-Hall, 1984
Buku Teks
Rodriguez, Rita M., author
Prentice-Hall, 1976
Buku Teks
Henning, Charles W., author
McGraw-Hill Kogakusha, 1978
Buku Teks
Harris, J. Manville.
Barron's Educational Series, 1992
Buku Teks
Root, Franklin R., author
South-Western Publishing, 1978
Buku Teks