Helmkamp, John G., author
John Wiley & Sons, 1990
Buku Teks
Titard, Pierre L., author
Dryden Press, 1987
Buku Teks
Dominiak, Geraldine F., author
PWS-Kent, 1991
Buku Teks
Moore, Carl L., author
South-Western Publishing, 1976
Buku Teks
Moore, Carl L., author
South-Western Publishing, 1984
Buku Teks