Sullivan, Michael, author
Harvester Wheatsheaf, 1992
Buku Teks
Dinitto, Diana M., author
Prentice-Hall, 2000
Buku Teks
Dinitto, Diana M., author
Pearson, 2012
Buku Teks
Stein, Theodore J., author
Columbia University Press, 2001
Buku Teks
by James E. Anderson; David Brady; Charles Bullock III; Joseph stewart, JR
Brooks/Cole; cengage learning, 1984
Buku Teks