Brown, William H., author
Saunders College, 1997
Buku Teks
Eaton, David C., author
McGraw-Hill, 1979
Buku Teks
McMurry, John, author
Brooks/Cole Pub., 1994
Buku Teks
Morrison, Robert Thornton, author
Prentice-Hall, 1992
Buku Teks
Hammett, Louis P., author
McGraw-Hill Kogakusha, 1970
Buku Teks