Klooster, Dale H., author
South-Western Publishing, 1983
Buku Teks
Klooster, Dale H., author
South-Western, 1990
Buku Teks
Sloan, M.E. (Martha E.), author
Addison-Wesley, 1980
Buku Teks
Givone, Donald D., author
McGraw-Hill, 1980
Buku Teks
Tocci, Ronald J., author
Prentice-Hall, 1982
Buku Teks