Currie, Elliott, author
Little, Brown, 1984
Buku Teks
by James E. Anderson; David Brady; Charles Bullock III; Joseph stewart, JR
Brooks/Cole; cengage learning, 1984
Buku Teks
Lewis, Sherman, author
Duxbury Press, 1980
Buku Teks
Palumbo, Dennis J., author
Harcourt Brace College, 1994
Buku Teks SO
Palumbo, Dennis J., author
Harcourt Brace College, 1994
Buku Teks SO