OBrien, Jack
Kiplinger Books, 1999
Buku Teks
Stair, Lila B.
Richard D. Irwin , 1980
Buku Teks
Your successful real estate career
American Management Association (Amacom) , 1997
Buku Teks
Foonberg, Jay G.
The American Bar Association, 1976
Buku Teks
Bear, Mariah, author
McGraw-Hill , 2000
Buku Teks