Hausladen, Gerhard, author
Birkhäuser , 2007
Buku Teks
Hausladen, Gerhard, author
Birkhauser, 2008
Buku Referensi
by Gerhard Hausladen...[et al.]
Birkhal'user, 2005
Buku Teks
Phelps, Joseph
Jossey-Bass, 1999
Buku Teks SO
Sandler, Corey, author
Prentice-Hall, 2001
Buku Teks