Bregman, Allyn, author
John Wiley & Sons, 1990
Buku Teks
Seidman, Lisa A., author
Prentice-Hall, 2000
Buku Teks
Landa, Fred, author
Burgess, 1974
Buku Teks
Estridge, Barbara H., author
Delmar Cengage Learning, 2012
Buku Teks
AMP Press, 2015
Buku Teks