Silberman, Melvin L., author
Pfeiffer, 2005
Buku Teks
Meyers, Chet, author
Jossey-Bass Publishers , 1993
Buku Teks
Hogan, Christine, author
Eruditions, 1999
Buku Teks
Luiz Carlos de Campos
Sense, 2012
eBooks
Sokoloff, David R, author
John Wiley & Sons, 2012
Buku Teks