Timberlake, Karen C., author
Prentice-Hall, 2007
Buku Teks
Scott, Ewing C.
Harper & Row, 1962
Buku Teks
Kotz, John C., author
Saunders College Publishing, 1987
Buku Teks
Hess, Fred C.
Made Simple Books, 1986
Buku Teks
Sienko, Michell J., author
McGraw-Hill Kogakusha, 1961
Buku Teks