Markus, John, 1911-, author
McGraw-Hill, 1974
Buku Referensi
Carr, Joseph J., author
McGraw-Hill, 1993
Buku Teks
Floyd, Thomas L., author
Prentice-Hall, 1996
Buku Teks
Smith, Ralph J., author
John Wiley & Sons, 1980
Buku Teks
Smith, Ralph J., author
John Wiley & Sons, 1987
Buku Teks