Kratovil, Robert, author
Prentice-Hall, 1974
Buku Teks
Bergfield, Philip B., author
McGraw-Hill, c1979
Buku Teks
Shenkel, William M., author
McGraw-Hill, 1980
Buku Teks
Shenkel, William M., author
Business Publications , 1980
Buku Teks
Fisher, Ernest McKinley, author
Macmillan, 1923
Buku Teks