Pierce, Phyllis S.
The irwin investor's handbook 1996
Irwin, 1996
 Buku Referensi
Telecommunications law handbook
edited by John Angel and Ian Walden
Blackstone Press, 1997
 Buku Teks
Telecommunications law handbook
edited by John Angel, Ian Walden
Blackstone Press, 1997
 Buku Referensi
Frieden, Rob
International telecommunications handbook / Rob Frieden
Artech House, Inc., 1996
 Buku Teks
Handbook of environmental psychology / edited by Stokols, Daniel; Altman, Irwin;
John Wiley & Sons, 1987
 Buku Teks