Moore, Carl L., author
South-Western Publishing, 1984
Buku Teks
Anderson, Lane K., author
South-Western Publishing, 1992
Buku Teks
Dominiak, Geraldine F., author
PWS-Kent, 1991
Buku Teks
Moore, Carl L., author
South-Western Publishing, 1976
Buku Teks
Bierman, Harold, author
Macmillan, 1959
Buku Teks