Katz, Harry C., author
McGraw-Hill, 2003
Buku Teks
Meyers, Frederick H., author
Richard D. Irwin, 1951
Buku Teks
Budd, John W., author
McGraw-Hill, 2005
Buku Teks
Lovejoy, Laurence C., author
Aleander Hamilton Institute, 1962
Buku Teks
Taylor, Benjamin J., author
Prentice-Hall, 1987
Buku Teks