Clowers, Myles L., author
McGraw-Hill, 1973
Buku Teks
Herring, E. Pendleton, author
Norton, 1966
Buku Teks
Bardes, Barbara A., author
Thomson/Wadsworth, 2006
Buku Teks
by James E. Anderson; David Brady; Charles Bullock III; Joseph stewart, JR
Brooks/Cole; cengage learning, 1984
Buku Teks
Rourke, Francis E., author
Little, Brown, 1979
Buku Teks