Rourke, Francis E., author
Little, Brown, 1979
Buku Teks
Davis, James W., Jr., author
Free, 1974
Buku Teks
Peters, B. Guy, author
Routledge, 2009
Buku Teks
by James E. Anderson; David Brady; Charles Bullock III; Joseph stewart, JR
Brooks/Cole; cengage learning, 1984
Buku Teks
Dinitto, Diana M., author
Prentice-Hall, 2000
Buku Teks