Eskew, Robert K., author
Random House Business Division, 1989
Buku Teks
Kochanek, Richard F., author
Harcourt Brace Jovanovich, 1990
Buku Teks
Tulsian, P.C., author
Tata McGraw-Hill, 1998
Buku Teks
Solomon, Lanny M., author
Harper & Row, 1985
Buku Teks
Diamond, Michael A., author
South-Western Publishing, 1993
Buku Teks